1. Arud Centres for Addiction Medicine Zurich Switzerland
2. Centre for Interdisciplinary Addiction Research of Hamburg University Department of Psychiatry University Medical Centre Eppendorf Hamburg Germany
3. Concept Schwerpunktpraxis Sucht Munich Germany
4. Praxis Turmstrasse Berlin Germany
5. Praxiszentrum im Tal Munich Germany
6. Ludwig‐Maximilians‐Universität Munich Germany
7. Interdisciplinary Centre for Clinical Trials (IZKS) University Medical Centre of the Johannes Gutenberg University Mainz Mainz Germany