[1] University Hospital of Essen,Institute for Medical Informatics, Biometry and Epidemiology
[2] University Duisburg-Essen,Clinical Epidemiology Unit, Institute of Medical Epidemiology, Biometry and Informatics, Medical Faculty
[3] University of Halle-Wittenberg,Clinic of Cardiology, West German Heart Centre, University Hospital of Essen
[4] University Duisburg-Essen,Institute of Medical Sociology
[5] University of Düsseldorf,Department of Endocrinology, Division of Laboratory Research, University Hospital of Essen
[6] University Duisburg-Essen,undefined
[7] Cardioangiology Centre,undefined
[8] Bethanien,undefined