1. Department of Addictive Behavior and Addiction Medicine, Central Institute of Mental Health (CIMH), Medical Faculty Mannheim Heidelberg University Mannheim Germany
2. Department of Biostatistics, Central Institute of Mental Health (CIMH), Medical Faculty Mannheim Heidelberg University Mannheim Germany
3. Department of Psychopharmacology, Central Institute of Mental Health (CIMH), Medical Faculty Mannheim Heidelberg University Mannheim Germany
4. Bethanian Hospital for Psychiatry, Psychosomatics and Psychotherapy Greifswald Germany