1 Department of Internal Medicine III, Klinikum der Universität München, Munich, Germany.
2 Division of Digestive and Liver Diseases, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY, USA;; II. Medizinische Klinik, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.
3 II. Medizinische Klinik, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.
4 Division of Digestive and Liver Diseases, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY, USA.