1. Department of Dermatology, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
2. Department of Medicine II, Gastroenterology, Hepatology, Endocrinology and Infectious Diseases, Medical Center, University of Freiburg, Freiburg, Germany
3. University of Freiburg Faculty of Medicine, Freiburg, Germany