1. Department of Addictive Behavior and Addiction Medicine Central Institute of Mental Health Mannheim Medical Faculty Mannheim Heidelberg University Germany
2. Department of Biostatistics Central Institute of Mental Health Mannheim Medical Faculty Mannheim Heidelberg University Germany
3. Department of Psychiatry and Psychotherapy Technische Universität Dresden Dresden Germany
4. Department of Psychiatry and Psychotherapy Campus Charité Mitte Charité – Universitätsmedizin Berlin Berlin Germany