1. Department of Psychosomatic Medicine; University Medicine Rostock; Rostock Germany
2. German Center for Neurodegenerative Diseases (DZNE); Rostock Germany
3. Rostock Center for the Study of Demographic Change; Rostock Germany
4. Department of Otorhinolaryngology, Head and Neck Surgery; University Medicine Rostock; Rostock Germany
5. Institute for Sociology and Demography; University of Rostock; Rostock Germany
6. German Center for Neurodegenerative Diseases; Bonn Germany
7. Max Planck Institute for Demographic Research; Rostock Germany