1. Department of Internal Medicine IV; University Hospital of Heidelberg; Heidelberg Germany
2. Department of Social Psychology; University of Mannheim; Mannheim Germany
3. Department of Medicine II (Gastroenterology, Hepatology and Infectious Diseases); University Hospital of Heidelberg at Mannheim; Mannheim Germany
4. Department of Internal Medicine I; University of Ulm; Ulm Baden-Wuerttemberg Germany
5. Department of Medicine II; Freiburg University Medical Center, University of Freiburg; Freiburg Germany
6. Department of Surgery; University Hospital of Heidelberg; Heidelberg Germany