Publications | Michael Schomaker

M. Schomaker, H. McIlleron, P. Denti, I. Dìaz (2024). Causal Inference for Continuous Multiple Time Point Interventions. Statistics in Medicine, 43(28): pp.5380-5400.

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M. Schomaker, P. Denti, A. Bienczak, D. Burger, I. Diaz, D. Gibb, S. Walker, H. McIlleron (2024). Determining Targets for Antiretroviral Drug Concentrations: a Causal Framework Illustrated with Pediatric Efavirenz Data from the CHAPAS-3 Trial. Pharmacoepidemiology and Drug Safety, 33:e70051.

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A. Chatton, M. Schomaker, M. Luque-Fernandez, R. Platt, M. Schnitzer (2024). Regression trees for nonparametric diagnostics of sequential positivity violations in longitudinal causal inference. arXiv e-prints, https://arxiv.org/abs/2412.10245.

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A. Holovchak, H. McIlleron, P. Denti, M. Schomaker (2024). Recoverability of Causal Effects under Presence of Missing Data: a Longitudinal Case Study. Biostatistics, in press.

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P. Nyakato, M. Schomaker, A. Boulle, J. Euvrard, R. Wood, B. Eley, H. Prozesky, B. Christ, N. Anderegg, I. Ayakaka, I. Rafael, C. Kunzekwenyika, C. Moore, M. van Lettow, C. Chimbetete, S. Mbewe, M. Ballif, M. Egger, C. Yiannoutsos, M. Cornell, M.A. Davies (2024). Correcting mortality estimates among children and youth on antiretroviral therapy in southern Africa: A comparative analysis between a multi-country tracing study and linkage to a health information exchange. Tropical Medicine and International Health, 29(8): pp.739-751.

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M. Schomaker, B. Kerschberger, A. Boulle (2024). Is Same-Day Antiretroviral Therapy Initiation Beneficial? Methodological Aspects when Comparing Observational and Randomized Studies. Cinical Infectious Diseases, 78(3): pp.800-801.

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B. Kerschberger, D. Vambe, M. Schomaker, E. Mabhena, M. Daka, T. Dlamini, S. Ngwenya, B. Mamba, B. Nxumalo, J. Sibanda, S. Dube, L. Mdluli Dlamini, E. Mukooza, T. Ellman, I. Ciglenecki (2024). Sustained high fatality during TB therapy amid rapid decline in TB mortality at population level: A retrospective cohort and ecological analysis from Shiselweni, Eswatini. Tropical Medicine and International Health, 29(3): pp.192-205.

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W.Buchberger, M. Schmied, M. Schomaker, A. Del Rio, U. Siebert (2024). Implementation of a comprehensive clinical risk management system in a university hospital. Quality and Safety in Health Care, 184: pp.18-25.

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C. Mesa-Viera, C. Didden, M. Schomaker, J. Mouton, N. Folb, L. van den Heuvel, C. Gastaldon, M. Cornell, M. Tlali, R. Kassanjee, O. Franco, S. Seedat, A. Haas (2024). Post-traumatic stress disorder as a risk factor for major adverse cardiovascular events: a cohort study of a South African medical insurance scheme. Epidemiology and Psychiatric Sciences, 33(e5): pp.1-9.

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L. Bothmann, S. Dandl, M. Schomaker (2023). Causal Fair Machine Learning via Rank-Preserving Interventional Distributions. arXiv e-prints, https://arxiv.org/abs/2307.12797.

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Y. Ruffieux, A. Wettstein, G. Maartens, N. Folb, C. Mesa Vieira, C. Didden, M. Tlali, C. Williams, M. Cornell, M. Schomaker, L. Johnson, J. Joska, M. Egger, A. Haas (2023). Life years lost associated with mental illness: A cohort study of beneficiaries of a South African medical insurance scheme. Journal of Affective Disorders, 340: pp.204-212.

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I. Stojkov, A. Conrads-Frank, U. Rochau, M. Arvandi, K. Koinig, M. Schomaker, M. Mittelman, P. Fenaux, D. Bowen, G. Sanz, L. Malcovati, S. Langemeijer, U. Germing, K. Madry, A. Guerci-Bresler, D. Culligan, I. Kotsianidis, L. Sanhes, J. Mills, S. Puntscher, D. Schmid, C. van Marrewijk, A. Smith, F. Efficace, T. de Witte, R. Stauder, U. Siebert (2023). Determinants of low health-related quality of life in patients with myelodysplastic syndromes: EUMDS Registry study. Blood Advances, 7(12): pp.2772–2783.

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M. Schomaker, P. Baumann (2023). Doubly Robust Estimation of Average Treatment Effects on the Treated through Marginal Structural Models. Observational Studies, 9(3): pp.43-57.

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C. Heumann, M. Schomaker, Shalabh (2023). Introduction to Statistics and Data Analysis - With Exercises, Solutions and Applications in R (Second updated and extended edition). Springer, Cham.

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R. Zepeda-Tello, M. Schomaker, C. Maringe, M. Smith, A. Belot, B. Rachet, M. Schnitzer, M. Luque-Fernandez (2022). The Delta-Method and Influence Function in Medical Statistics: a Reproducible Tutorial. arXiv e-prints, https://arxiv.org/abs/2206.15310.

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F. Kühne, M. Schomaker, I. Stojkov, B. Jahn, A. Conrads-Frank, S. Siebert, G. Sroczynski, S. Puntscher, D. Schmid, P. Schnell-Inderst, U. Siebert (2022). Causal evidence in health decision making: methodological approaches of causal inference and health decision science. German Medical Science, 20(12): pp.1-24.

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P. Nyakato, B. Christ, N. Anderegg, J. Muhairwe, L. Jefferys, J. van Dijk, M. Vinikoor, M. van Lettow, C. Chimbetete, S. Phiri, M. Egger, M. Ballif, C. Yiannoutsos, M. Schomaker, R. Kassanjee, M.A. Davies, M. Cornell (2022). High Unreported Mortality in Children and Youth (<25 Years) Living With HIV Who Were Lost to Care From Antiretroviral Therapy Programs in Southern Africa: Results From a Multicountry Tracing Study. Journal of Acquired Immune Deficiency Syndromes, 91(5): pp.429-433.

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P. Nyakato, M. Schomaker, G. Fatti, F. Tanser, J. Euvrard, N. Sipambo, M. Fox, A. Haas, C. Yiannoutsos, M.A. Davies, M. Cornell (2022). Virologic non-suppression and early loss to follow up among pregnant and non-pregnant adolescents aged 15–19 years initiating antiretroviral therapy in South Africa: a retrospective cohort study. Journal of the International AIDS Society, 25(1): pp.e25870.

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B. Kerschberger, A. Aung, Q. Mpala, N. Ntshalintshali, C. Mamba, M. Schomaker, M. Tombo, G. Maphalala, D. Sibandze, L. Dube, R. Kashangura, S. Mthethwa-Hleza, A. Telnov, R. de la Tour, A. Gonzales, A. Calmy, I. Ciglenecki (2021). Predicting, Diagnosing, and Treating Acute and Early HIV Infection in a Public Sector Facility in Eswatini. Journal of Acquired Immune Deficiency Syndromes, 88(5): pp.506-517.

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P. Baumann, M. Schomaker, E. Rossi (2021). Estimating the Effect of Central Bank Independence on Inflation Using Longitudinal Targeted Maximum Likelihood Estimation. Journal of Causal Inference, 9(1): pp.109-146.

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B. Kerschberger, A. Boulle, R. Kuwenga, I. Ciglenecki, M. Schomaker (2021). The impact of same-day antiretroviral therapy initiation under the WHO Treat-All policy. American Journal of Epidemiology, 190(8):1519-1532.

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J. Laimer, M. Hechenberger, D. Müller, B. Walch, A. Kolk, D. Schnabl, M. Schomaker, E. Bruckmoser (2021). Dental pathologies in tumor patients with bone metastases or multiple myeloma scheduled for antiresorptive therapy. Future Oncolgy, 17(21): pp.2705-2711.

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J. Laimer, M. Hechenberger, J. Lercher, E. Born, M. Schomaker, S. Puntscher, U. Siebert, E. Bruckmoser (2021). New Perspective for Soft Tissue Closure in Medication-Related Osteonecrosis of the Jaw (MRONJ) Using Barbed Sutures. Journal of Clinical Medicine, 10(8): pp.1677.

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M. Schomaker (2021). Regression and Causality. arXiv e-prints, https://arxiv.org/abs/2006.11754.

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P. Nyakato, M. Schomaker, N. Sipambo, K. Technau, G. Fatti, H. Rabie, F. Tanser, B. Eley, J. Euvrard, R. Wood, P. Tsondai, C. Yiannoutsos, M. Cornell, M. Davies (2021). Virologic response of adolescents living with perinatally acquired HIV receiving antiretroviral therapy in the period of early adolescence (10-14 years) in South Africa. AIDS, 35(6): pp.971-978.

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T. Moyo, F. Guleid, M. Schomaker, C. Williamson, J. Dorfman (2020). HIV-1 Subtype C Tier 3 Viruses Have Increased Infectivity Compared to Tier 2 Viruses. AIDS Research and Human Retroviruses, 36(12): pp.1010-1019.

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H. Bell-Gorrod, M. Fox, A. Boulle, H. Prozesky, R. Wood, F. Tanser, M.A. Davies, M. Schomaker (2020). The impact of delayed switch to second-line antiretroviral therapy on mortality, depending on failure time definition and CD4 count at failure. American Journal of Epidemiology, 189(8): pp.811-819.

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H. Bell-Gorrod, R. Court, M. Schomaker, G. Maartens, R. A. Murphy (2020). Increased Mortality with Delayed and Missed Switch to Second-Line Antiretroviral Therapy in South Africa. Journal of Acquired Immune Deficiency Syndromes, 84(1): pp.107-113.

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B. Kerschberger, M. Schomaker, K. Jobanputra, S. M. Kabore, R. Teck, E. Mabhena, S. Mthethwa-Hleza, B. Rusch, I. Ciglenecki, A. Boulle (2020). HIV programmatic outcomes following implementation of the 'Treat-All' policy in a public sector setting in Eswatini: a prospective cohort study. Journal of the International AIDS Society, 23(3): pp.e25458.

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M. Schomaker, C. Heumann (2020). When and when not to use optimal model averaging. Statistical Papers, 61: pp.2221-2240.

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M. Schomaker, F. Kühne, U. Siebert (2020). Regarding: Effect Estimates in Randomized Trials and Observational Studies: Comparing Apples with Apples. American Journal of Epidemiology, 189(1): pp.77-78.

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Julie Jesson, Michael Schomaker, Karen Malasteste, Dewi K. Wati, Azar Kariminia, Mariam Sylla, Kouakou Kouadio, Shobna Sawry, Mwangelwa Mubiana-Mbewe, Samuel Ayaya, Rachel Vreeman, Catherine C. McGowan, Marcel Yotebieng, Valeriane Leroy, Mary-Ann Davies (2019). Stunting and growth velocity of adolescents with perinatally acquired HIV: differential evolution for males and females. A multiregional analysis from the IeDEA global paediatric collaboration. Journal of the International AIDS Society, 22(11): pp.e25412.

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M. Schomaker, M. A. Luque Fernandez, V. Leroy, M. A. Davies (2019). Using Longitudinal Targeted Maximum Likelihood Estimation in Complex Settings with Dynamic Interventions. Statistics in Medicine, 38: pp.4888-4911.

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B. Kerschberger, K. Jobanputra, M. Schomaker, S. M. Kabore, R. Teck, E. Mabhena, N. Lukhele, B. Rusch, A. Boulle, I. Ciglenecki (2019). Feasibility of antiretroviral therapy initiation under the treat-all policy under routine conditions: a prospective cohort study from Eswatini. Journal of the International AIDS Society, 22(10): pp.e25401.

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B. Kerschberger, M. Schomaker, A. Telnov, D. Vambe, N. Kisyeri, W. Sikhondze, L. Pasipamire, S. M. Ngwenya, B. Rusch, I. Ciglenecki, A. Boulle (2019). Decreased risk of HIV-associated TB during antiretroviral therapy expansion in rural Eswatini from 2009 to 2016: a cohort and population-based analysis. Tropical Medicine and International Health, 24(9): pp.1114-1127.

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B. Kerschberger, M. Schomaker, I. Ciglenecki, L. Pasipamire, E. Mabhena, A. Telnov, B. Rusch, N. Lukhele, R. Teck, A. Boulle (2019). Programmatic outcomes and impact of rapid public sector antiretroviral therapy expansion in adults prior to introduction of the WHO treat-all approach in rural Eswatini. Tropical Medicine and International Health, 24(6): pp.701-714.

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G. Patten, M. Schomaker, M. A. Davies, H. Rabie, G. van Zyl, K. Technau, B. Eley, A. Boulle, R. B. Van Dyke, K. Patel, N. Sipambo, R. Wood, F. Tanser, J. Giddy, M. Cotton, J. Nuttall, G. Essack, B. Karalius, G. Seage, S. Sawry, M. Egger, L. Fairlie (2019). What Should We Do When HIV-positive Children Fail First-line Combination Antiretroviral Therapy? A Comparison of 4 ART Management Strategies. Pediatric Infectious Disease Journal, 38(4): pp.400-405.

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M. A. Luque Fernandez, M. Schomaker, D. Redondo-Sanchez, M.J. Sanchez Perez, A. Vaidya, M. E. Schnitzer (2019). Paradoxical Collider Effect in the Analysis of Non-Communicable Disease Epidemiological Data: a reproducible illustration and web application. International Journal of Epidemiology, 48(2): pp.640-653.

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M. A. Luque-Fernandez, D. Redondo-Sanchez, M. Schomaker (2019). Effect Modification and Collapsibility in Evaluations of Public Health Interventions. American Journal of Public Health, 109(3): pp.e12-e13.

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C. Gehringer, H. Rode, M. Schomaker (2018). The Effect of Electrical Load Shedding on Pediatric Hospital Admissions in South Africa. Epidemiology, 29(6): pp.841-847.

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J. K. Nono, S. D. Kamdem, P. M. Netongo, S. Dabee, M. Schomaker, A. Oumarou, F. Brombacher, R. Moyou-Somo (2018). Schistosomiasis Burden and Its Association With Lower Measles Vaccine Responses in School Children From Rural Cameroon. Frontiers in Immunology, 9: pp.2295.

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M. A. Luque-Fernandez, M. Schomaker, B. Rachet, M. E. Schnitzer (2018). Targeted maximum likelihood estimation for a binary treatment: A tutorial. Statistics in Medicine, 37(16): pp.2530-2546.

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M. Schomaker, C. Heumann (2018). Bootstrap inference when using multiple imputation. Statistics in Medicine, 37(14): pp.2252-2266.

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A. L. Slogrove, M. Schomaker, M. A. Davies, P. Williams, S. Balkan, J. Ben-Farhat, N. Calles, K. Chokephaibulkit, C. Duff, T. F. Eboua, A. Kekitiinwa-Rukyalekere, N. Maxwell, J. Pinto, 3rd Seage G., C. A. Teasdale, S. Wanless, J. Warszawski, K. Wools-Kaloustian, M. Yotebieng, V. Timmerman, I. J. Collins, R. Goodall, C. Smith, K. Patel, M. Paul, D. Gibb, R. Vreeman, E. J. Abrams, R. Hazra, R. Van Dyke, L. G. Bekker, L. Mofenson, M. Vicari, S. Essajee, M. Penazzato, G. Anabwani, Q. Mohapi E, N. Kazembe P, M. Hlatshwayo, M. Lumumba, T. Goetghebuer, C. Thorne, L. Galli, A. van Rossum, C. Giaquinto, M. Marczynska, L. Marques, F. Prata, L. Ene, L. Okhonskaia, P. Rojo, C. Fortuny, L. Naver, C. Rudin, S. Le Coeur, A. Volokha, V. Rouzier, R. Succi, A. Sohn, A. Kariminia, A. Edmonds, P. Lelo, S. Ayaya, P. Ongwen, L. F. Jefferys, S. Phiri, M. Mubiana-Mbewe, S. Sawry, L. Renner, M. Sylla, M. J. Abzug, M. Levin, J. Oleske, M. Chernoff, S. Traite, M. Purswani, E. G. Chadwick, A. Judd, V. Leroy (2018). The epidemiology of adolescents living with perinatally acquired HIV: A cross-region global cohort analysis. PLoS Medicine, 15(3): pp.e1002514.

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A. L. Slogrove, M. Yotebieng, M. Schomaker, M. A. Davies, A. Judd, V. Leroy, P. Williams, S. Balkan, J. Ben-Farhat, N. Calles, K. Chokephaibulkit, C. Duff, T. F. Eboua, A. Kekitiinwa, N. Maxwell, J. Pinto, G. Seage, C. Teasdale, S. Wanless, J. Warszawski, K. Wools-Kaloustian (2018). Inequality in outcomes for adolescents living with perinatally acquired HIV in sub-Saharan Africa: a Collaborative Initiative for Paediatric HIV Education and Research (CIPHER) Cohort Collaboration analysis. Journal of the International AIDS Society, 21: pp.e25044.

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M. Schomaker, M. A. Davies, M. Cornell, N. Ford (2018). Assessing the risk of dolutegravir for women of childbearing potential. Lancet Global Health, 6(9): pp.e958-e959.

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S. R. Kaplan, C. Oosthuizen, K. Stinson, F. Little, J. Euvrard, M. Schomaker, M. Osler, K. Hilderbrand, A. Boulle, G. Meintjes (2017). Contemporary disengagement from antiretroviral therapy in Khayelitsha, South Africa: A cohort study. PLoS Medicine, 14(11): pp.e1002407.

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M. Cornell, L. F. Johnson, R. Wood, F. Tanser, M. P. Fox, H. Prozesky, M. Schomaker, M. Egger, M. A. Davies, A. Boulle (2017). Twelve-year mortality in adults initiating antiretroviral therapy in South Africa. Journal of the International AIDS Society, 20(1): pp.21902.

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M. Schomaker, V. Leroy, T. Wolfs, K. G. Technau, L. Renner, A. Judd, S. Sawry, M. Amorissani-Folquet, A. Noguera-Julian, F. Tanser, F. Eboua, M. L. Navarro, C. Chimbetete, C. Amani-Bosse, J. Warszawski, S. Phiri, S. N’Gbeche, V. Cox, F. Koueta, J. Giddy, H. Sygnate-Sy, D. Raben, G. Chene, M. A. Davies (2017). Optimal timing of antiretroviral treatment initiation in HIV-positive children and adolescents: a multiregional analysis from Southern Africa, West Africa and Europe. International Journal of Epidemiology, 46(2): pp.453-465.

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C. Heumann, M. Schomaker, Shalabh (2016). Introduction to Statistics and Data Analysis - With Exercises, Solutions and Applications in R. Springer, Heidelberg.

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S. Karamchand, R. Leisegang, M. Schomaker, G. Maartens, L. Walters, M. Hislop, J. A. Dave, N. S. Levitt, K. Cohen (2016). Risk Factors for Incident Diabetes in a Cohort Taking First-Line Nonnucleoside Reverse Transcriptase Inhibitor-Based Antiretroviral Therapy. Medicine, 95(9): pp.e2844.

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J. Ohlander, S. M. Huber, M. Schomaker, C. Heumann, R. Schierl, B. Michalke, O. G. Jenni, J. Caflisch, D. M. Munoz, O. S. von Ehrenstein, K. Radon (2016). Mercury and neuromotor function among children in a rural town in Chile. International Journal of Occupational and Environmental Health, 22(1): pp.27-35.

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R. R. Moholisa, M. Schomaker, L. Kuhn, S. Castel, L. Wiesner, A. Coovadia, R. Strehlau, F. Patel, F. Pinillos, E. J. Abrams, G. Maartens, H. McIlleron (2016). Effect of Lopinavir and Nevirapine Concentrations on Viral Outcomes in Protease Inhibitor-experienced HIV-infected Children. Pediatric Infectious Disease Journal, 35(12): pp.e378-e383.

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A. Grimsrud, M. Cornell, M. Schomaker, M. P. Fox, C. Orrell, H. Prozesky, K. Stinson, F. Tanser, M. Egger, L. Myer (2016). CD4 count at antiretroviral therapy initiation and the risk of loss to follow-up: results from a multicentre cohort study. Journal of Epidemiology and Community Health, 70(6): pp.549-55.

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L. F. Johnson, R. E. Dorrington, R. Laubscher, C. J. Hoffmann, R. Wood, M. P. Fox, M. Cornell, M. Schomaker, H. Prozesky, F. Tanser, M. A. Davies, A. Boulle (2015). A comparison of death recording by health centres and civil registration in South Africans receiving antiretroviral treatment. Journal of the International AIDS Society, 18(1): pp.20628.

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D. J. Pepper, M. Schomaker, R. J. Wilkinson, V. de Azevedo, G. Maartens (2015). Independent predictors of tuberculosis mortality in a high HIV prevalence setting: a retrospective cohort study. AIDS Research and Therapy, 12: pp.35.

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B. Kerschberger, A. M. Boulle, K. Kranzer, K. Hilderbrand, M. Schomaker, D. Coetzee, E. Goemaere, G. Van Cutsem (2015). Superior virologic and treatment outcomes when viral load is measured at 3 months compared to 6 months on antiretroviral therapy. Journal of the International AIDS Society, 18(1): pp.20092.

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M. Schomaker, S. Hogger, L. F. Johnson, C. J. Hoffmann, T. Barnighausen, C. Heumann (2015). Simultaneous Treatment of Missing Data and Measurement Error in HIV Research Using Multiple Overimputation. Epidemiology, 26(5): pp.628-636.

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M. A. Luque-Fernandez, C. V. Ananth, V. W. Jaddoe, R. Gaillard, P. S. Albert, M. Schomaker, P. McElduff, D. A. Enquobahrie, B. Gelaye, M. A. Williams (2015). Is the fetoplacental ratio a differential marker of fetal growth restriction in small for gestational age infants?. European Journal of Epidemiology, 30(4): pp.331-41.

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J. Ohlander, S. M. Huber, M. Schomaker, C. Heumann, R. Schierl, B. Michalke, O. G. Jenni, J. Caflisch, D. M. Munoz, O. S. von Ehrenstein, K. Radon (2015). Correction: Risk Factors for Mercury Exposure of Children in a Rural Mining Town in Northern Chile. PloS One, 10(12): pp.e0144527.

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R. A. Jacob, T. Moyo, M. Schomaker, F. Abrahams, B. Grau Pujol, J. R. Dorfman (2015). Anti-V3-Glycan and Anti-MPER Neutralizing Antibodies, but Not Anti-V2-Glycan Site Antibodies, Are Strongly Associated with Greater Anti-HIV-1 Neutralization Breadth and Potency. Journal of Virology, 89(10): pp.5264-75.

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M. Cornell, L. F. Johnson, M. Schomaker, F. Tanser, M. Maskew, R. Wood, H. Prozesky, J. Giddy, K. Stinson, M. Egger, A. Boulle, L. Myer, Aids-Southern Africa Collaboration International Epidemiologic Databases to Evaluate (2015). Age in antiretroviral therapy programmes in South Africa: a retrospective, multicentre, observational cohort study. Lancet HIV, 2(9): pp.e368-75.

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L. F. Johnson, J. Estill, O. Keiser, M. Cornell, H. Moolla, M. Schomaker, A. Grimsrud, M. A. Davies, A. Boulle (2014). Do increasing rates of loss to follow-up in antiretroviral treatment programs imply deteriorating patient retention?. American Journal of Epidemiology, 180(12): pp.1208-12.

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M. Schomaker (2014). Implications of causal modelling studies on the question of when to start antiretroviral treatment in young children. SACEMA Quarterly, November issue.

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M. Petersen, J. Schwab, S. Gruber, N. Blaser, M. Schomaker, M. van der Laan (2014). Targeted Maximum Likelihood Estimation for Dynamic and Static Longitudinal Marginal Structural Working Models. Journal of causal inference, 2(2): pp.147-185.

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K. G. Technau, M. Schomaker, L. Kuhn, H. Moultrie, A. Coovadia, B. Eley, H. Rabie, R. Wood, V. Cox, L. S. Vizcaya, E. Muchiri, M. A. Davies (2014). Virologic response in children treated with abacavir-compared with stavudine-based antiretroviral treatment: a South African multi-cohort analysis. Pediatric Infectious Disease Journal, 33(6): pp.617-622.

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M. Schomaker, C. Heumann (2014). Model selection and model averaging after multiple imputation. Computational Statistics & Data Analysis, 71: pp.758-770.

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R. R. Moholisa, M. Schomaker, L. Kuhn, S. Meredith, L. Wiesner, A. Coovadia, R. Strehlau, L. Martens, E. J. Abrams, G. Maartens, H. McIlleron (2014). Plasma lopinavir concentrations predict virological failure in a cohort of South African children initiating a protease-inhibitor-based regimen. Antiviral Therapy, 19(4): pp.399-406.

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M. Schomaker, T. Gsponer, J. Estill, M. Fox, A. Boulle (2014). Non-ignorable loss to follow-up: correcting mortality estimates based on additional outcome ascertainment. Statistics in Medicine, 33(1): pp.129-42.

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J. Ohlander, S. M. Huber, M. Schomaker, C. Heumann, R. Schierl, B. Michalke, O. G. Jenni, J. Caflisch, D. M. Munoz, O. S. von Ehrenstein, K. Radon (2013). Risk factors for mercury exposure of children in a rural mining town in northern Chile. PloS One, 8(11): pp.e79756.

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M. Schomaker, M. Egger, J. Ndirangu, S. Phiri, H. Moultrie, K. Technau, V. Cox, J. Giddy, C. Chimbetete, R. Wood, T. Gsponer, C. Bolton Moore, H. Rabie, B. Eley, L. Muhe, M. Penazzato, S. Essajee, O. Keiser, M. A. Davies (2013). When to start antiretroviral therapy in children aged 2-5 years: a collaborative causal modelling analysis of cohort studies from southern Africa. PLoS Medicine, 10(11): pp.e1001555.

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M. A. Luque-Fernandez, M. Franco, B. Gelaye, M. Schomaker, I. G. Garitano, C. D’Este, M. A. Williams (2013). Unemployment and stillbirth risk among foreign-born and Spanish pregnant women in Spain, 2007-2010: a multilevel analysis study. European Journal of Epidemiology, 28(12): pp.991-999.

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M. Schomaker, M. Egger, M. Maskew, D. Garone, H. Prozesky, C. J. Hoffmann, A. Boulle, L. Fenner (2013). Immune recovery after starting ART in HIV-infected patients presenting and not presenting with tuberculosis in South Africa. Journal of Acquired Immune Deficiency Syndromes, 63(1): pp.142-145.

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C. J. Hoffmann, M. Schomaker, M. P. Fox, P. Mutevedzi, J. Giddy, H. Prozesky, R. Wood, D. B. Garone, M. Egger, A. Boulle (2013). CD4 count slope and mortality in HIV-infected patients on antiretroviral therapy: multicohort analysis from South Africa. Journal of Acquired Immune Deficiency Syndromes, 63(1): pp.34-41.

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L. F. Johnson, J. Mossong, R. E. Dorrington, M. Schomaker, C. J. Hoffmann, O. Keiser, M. P. Fox, R. Wood, H. Prozesky, J. Giddy, D. B. Garone, M. Cornell, M. Egger, A. Boulle, Aids Southern Africa Collaboration International Epidemiologic Databases to Evaluate (2013). Life expectancies of South African adults starting antiretroviral treatment: collaborative analysis of cohort studies. PLoS Medicine, 10(4): pp.e1001418.

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H. M. McIlleron, M. Schomaker, Y. Ren, P. Sinxadi, J. J. Nuttall, H. Gous, H. Moultrie, B. Eley, C. Merry, P. Smith, D. W. Haas, G. Maartens (2013). Effects of rifampin-based antituberculosis therapy on plasma efavirenz concentrations in children vary by CYP2B6 genotype. AIDS, 27(12): pp.1933-40.

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M. A. Luque-Fernandez, G. Van Cutsem, E. Goemaere, K. Hilderbrand, M. Schomaker, N. Mantangana, S. Mathee, V. Dubula, N. Ford, M. A. Hernan, A. Boulle (2013). Effectiveness of patient adherence groups as a model of care for stable patients on antiretroviral therapy in Khayelitsha, Cape Town, South Africa. PloS One, 8(2): pp.e56088.

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L. Fenner, S. E. Reid, M. P. Fox, D. Garone, M. Wellington, H. Prozesky, M. Zwahlen, M. Schomaker, G. Wandeler, N. Kancheya, A. Boulle, R. Wood, G. Henostroza, M. Egger (2013). Tuberculosis and the risk of opportunistic infections and cancers in HIV-infected patients starting ART in Southern Africa. Tropical Medicine and International Health, 18(2): pp.194-8.

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M. Cornell, M. Schomaker, D. B. Garone, J. Giddy, C. J. Hoffmann, R. Lessells, M. Maskew, H. Prozesky, R. Wood, L. F. Johnson, M. Egger, A. Boulle, L. Myer, Aids Southern Africa Collaboration International Epidemiologic Databases to Evaluate (2012). Gender differences in survival among adult patients starting antiretroviral therapy in South Africa: a multicentre cohort study. PLoS Medicine, 9(9): pp.e1001304.

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M. E. Visser, M. C. Stead, G. Walzl, R. Warren, M. Schomaker, H. M. Grewal, E. C. Swart, G. Maartens (2012). Baseline predictors of sputum culture conversion in pulmonary tuberculosis: importance of cavities, smoking, time to detection and W-Beijing genotype. PloS One, 7(1): pp.e29588.

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M. Schomaker (2012). Shrinkage averaging estimation. Statistical Papers, 53(4): pp.1015-1034.

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R. A. Jacob, F. Abrahams, M. Tongo, M. Schomaker, P. Roux, E. Mpoudi Ngole, W. A. Burgers, J. R. Dorfman (2012). Refined identification of neutralization-resistant HIV-1 CRF02_AG viruses. Journal of Virology, 86(14): pp.7699-703.

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M. A. Luque Fernandez, M. Schomaker, P. R. Mason, J. F. Fesselet, Y. Baudot, A. Boulle, P. Maes (2012). Elevation and cholera: an epidemiological spatial analysis of the cholera epidemic in Harare, Zimbabwe, 2008-2009. BMC Public Health, 12: pp.442.

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M. Schomaker, C. Heumann (2011). Model averaging in factor analysis: an analysis of Olympic decathlon data. Journal of Quantitative Analysis in Sports, Vol. 7: Iss. 1, Article 4.

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M. Schomaker, A. T. K. Wan, C. Heumann (2010). Frequentist Model Averaging with missing observations. Computational Statistics & Data Analysis, 54(12): pp.3336-3347.

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M. Schomaker (2010). Selektieren und Kombinieren von Modellen unter Berücksichtigung der Problematik fehlender Daten (in German, also doctoral thesis). Cuvillier, Göttingen.

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H. Toutenburg, C. Heumann (2009). Deskriptive Statistik - Eine Einführung in Methoden und Anwendungen mit R und SPSS (in German), 7th extended edition with contributions by Michael Schomaker. Springer, Heidelberg.

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H. Toutenburg, P. Knöfel (2009). Six Sigma – Methoden und Statistik für die Praxis (in German), 2nd extended edition with contributions by Ingrid Kreuzmair, Michael Schomaker, Dietmar Williams-Böker. Springer, Heidelberg.

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H. Toutenburg, M. Schomaker, M. Wißmann, C. Heumann (2009). Arbeitsbuch zur deskriptiven und induktiven Statistik (in German). Springer, Heidelberg.

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C. R. Rao, H. Toutenburg, Shalabh, C. Heumann (2008). Linear Models and Generalizations - Least Squares and Alternatives, 3rd extended edition with contributions by Michael Schomaker. Springer, Heidelberg.

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H. Toutenburg, C. Heumann (2008). Induktive Statistik - Eine Einführung mit R und SPSS (in German), 4th extended edition with contributions by Michael Schomaker and Malte Wißmann. Springer, Heidelberg.

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