1. Institute of Epidemiology II, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
2. Department of Epidemiology, Institut für Medizinische Informatik Biometrie und Epidemiologie, and
3. Department of Statistics, Ludwig-Maximilians-Universität München, Munich, Germany
4. Department of Cardiology, University of Ulm Medical Center, Ulm, Germany