1. Department of Internal Medicine I University Hospital Ulm Germany
2. Institute of Physiological Chemistry University of Ulm Germany
3. Department of General Surgery, Klinikum Rechts der Isar Technical University Munich Germany
4. Department of Medicine and Centre for Alcohol Research, Salem Medical Centre University of Heidelberg Germany
5. Spital Waldshut Waldshut‐Tiengen Germany
6. IZKF and Department of Internal Medicine III RWTH Aachen Germany