1. Department of Psychiatry and Psychotherapy, LVR-University Hospital Essen, University of Duisburg-Essen, Virchowstraße 174, 45147 Essen, Germany
2. University of Applied Labour Studies, Seckenheimer Landstraße 16, 68163 Mannheim, Germany
3. Johannesbad Kliniken Fredeburg GmbH, Zu den drei Buchen 1, 57392 Schmallenberg, Germany