1. German Diabetes Centre Leibniz Institute for Diabetes Research at Heinrich Heine University Düsseldorf Institute for Biometrics and Epidemiology Düsseldorf Germany
2. German Centre for Diabetes Research (DZD) Neuherberg Germany
3. Helmholtz Zentrum München Institute of Health Economics and Health Care Management German Research Centre for Environmental Health Neuherberg Germany
4. Institute of Medical Statistics Düsseldorf University Hospital and Medical Faculty Heinrich Heine University Düsseldorf Düsseldorf Germany
5. University of Ulm Institute of Epidemiology and Medical Biometry ZIBMT Ulm Germany