1. Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
2. Department of Pain Medicine, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
3. Institute for Medical Informatics, Biometry and Epidemiology, Ludwig-Maximilians-University München, Munich, Germany
4. Medical Park Chiemseeblick, Bernau, Germany