1. Environmental Epidemiology Group, IUF (Institut für umweltmedizinische Forschung)-Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
2. Department of Neurology, University Hospital of Essen, University of Duisburg-Essen, Essen, Germany
3. Institute for Medical Informatics, Biometry and Epidemiology, University Duisburg-Essen, Essen, Germany
4. Department of Chronic Disease Epidemiology, Swiss Tropical and Public Health Institute, Switzerland
5. University of Basel, Basel, Switzerland
6. Clinic of Cardiology, West German Heart Center, University Hospital of Essen, University Duisburg-Essen, Essen, Germany
7. Deanery of Medicine, Medical Faculty, Heinrich Heine University of Düsseldorf, Düsseldorf, Germany