1. Department of Public Health; Faculty of Medicine; Heinrich-Heine-University; Düsseldorf Germany
2. Institute of Biometrics and Epidemiology; German Diabetes Center at the Heinrich-Heine-University; Leibniz-Center for Diabetes Research; Düsseldorf Germany
3. Institute of Epidemiology II; Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH); Neuherberg Germany
4. German Center for Diabetes Research; Neuherberg Germany
5. Institute of Health Economics and Health Care Management; Helmholtz Zentrum München; German Research Center for Environmental Health (GmbH); Neuherberg Germany