1. Institute of Epidemiology II; Helmholtz Zentrum München; Neuherberg Germany
2. Institute and Outpatient Clinic for Occupational, Social, and Environmental Medicine; Klinikum der Universität München; Munich Germany
3. Department of Epidemiology; Geisel School of Medicine at Dartmouth; Lebanon New Hampshire USA
4. Department for Psychosomatic Medicine and Psychotherapy; Klinikum rechts der Isar; Munich Germany