1. Department of Psychiatry and Psychotherapy, University of Mainz, Germany
2. Department of Addictive Behaviour and Addiction Medicine, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Germany
3. Psychiatric Hospital Scivias St. Valentinushaus Bad Soden, Bad Soden, Germany
4. Department of Psychiatry and Psychotherapy, University of Hamburg, Germany
5. AMEOS Klinikum Heiligenhafen, Heiligenhafen, Germany