1. Department of Clinical Pharmacology and Toxicology; Charité-Universitätsmedizin Berlin; Berlin; Germany
2. Institute for Social Medicine, Epidemiology and Health Economy; Charité-Universitätsmedizin Berlin; Berlin; Germany
3. Department of Surgery; Maria-Heimsuchung Caritas Klinik Pankow; Berlin; Germany
4. Department of Gastroenterology, Endocrinology and Clinical Nutrition; Klinikum Bremen Mitte; Bremen; Germany