?:authorAffiliation
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[\'Working Group Statistical Methods in Epidemiology, Department of Medical Biometry, Informatics and Epidemiology, Faculty of Medicine, University of Bonn, Bonn, Germany. christian.staerk@imbie.uni-bonn.de.\', \'Working Group Statistical Methods in Epidemiology, Department of Medical Biometry, Informatics and Epidemiology, Faculty of Medicine, University of Bonn, Bonn, Germany.\']
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