1. Department of General, Visceral-, Thoracic-, Transplantation- and Paediatric-Surgery, UKSH, Campus Kiel, Kiel, Germany
2. Addictive Behaviors Unit, Clinical Neuroscience Institute, Clinic Hospital, Barcelona, Spain
3. Department of Internal Medicine I, UKSH, Campus Kiel, Kiel, Germany
4. Gastroenterologisch-Hepatologisches MVZ Kiel GmbH, Kiel, Germany
5. Institute of Forensic Medicine, Forensic Toxicology and Chemistry, University of Bern, Bern, Switzerland
6. Institute of Forensic Medicine, Forensic Toxicology, Kantonsspital Aarau, Aarau, Switzerland
7. Laboratoire National de Santé, Forensic Toxicology, Dudelange, Luxembourg
8. Department of Psychiatry and Psychotherapy, University of Basel, Basel, Switzerland