1. IUF-Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
2. Institute for Medical Informatics, Biometry and Epidemiology, University Hospital, University Duisburg-Essen, Essen, Germany
3. Rhenish Institute for Environmental Research (RIU), Köln, Germany
4. University Hospital of Essen, Essen, Germany
5. Department of Cardiology, Hospital Bethanien Moers, Moers, Germany
6. West German Heart Center, University Hospital of Essen, Essen, Germany
7. Medical Faculty, Heinrich Heine University of Düsseldorf, Düsseldorf, Germany