1. Institute for Community Medicine (Schulze, Stentzel, Hoffmann, van den Berg) and Department of Psychiatry and Psychotherapy (Schulze, Leipert, Schulte, Freyberger, Grabe), University Medicine Greifswald, Greifswald, Germany; Department for Psychiatry and Psychotherapy, HELIOS Hanseklinikum Stralsund, Stralsund, Germany (Freyberger); Psychosomatics and Psychotherapy, Bethanien Hospital for Psychiatry, Greifswald, Germany (Langosch).