1. Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Greifswald, Germany
2. Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
3. Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Rostock, Germany
4. Department for Psychosomatic and Psychotherapeutical Medicine, Rostock University Medical Center, Rostock, Germany