1. German Center for Neurodegenerative Diseases (DZNE), Rostock/Greifswald, Greifswald, Germany
2. Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
3. German Center for Neurodegenerative Diseases (DZNE), Rostock/Greifswald, Rostock, Germany
4. Department of Psychosomatic Medicine, University of Rostock, Rostock, Germany
5. Department of Epidemiology of Health Care and Community Health, Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany