1. Institute of Epidemiology II, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
2. Department of Medical Informatics, Biometry and Epidemiology, Ludwig- Maximilian- Universität München, Germany
3. Institute of Public Health, Im Neuenheimer Feld 324, Heidelberg University
4. Department of Psychosomatic Medicine and Psychotherapy, Munich, Germany