1. Mannheim Institute of Public Health, Social and Preventive Medicine, Competence Center for Social Medicine and Occupational Health Promotion, Mannheim Medical Faculty, University of Heidelberg, Mannheim, Germany
2. Institute of Psychology, Department of Psychological Aging Research, University of Heidelberg, Heidelberg, Germany
3. Departments of Medicine, Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, OH, USA