Johannes Gutenberg University Mainz - I. Med. Klinik und Poliklinik, Johannes Gutenberg University Mainz - I. Med. Klinik und Poliklinik, Charité - Universitätsmedizin Berlin, Tel Aviv University - Sackler Faculty of Medicine, University of Duisburg-Essen - University Hospital Essen, University Hospital Ulm, University of Mannheim, Krankenhaus Nordwest General Hospital - Institute of Clinical Cancer Research (ICCR), Hannover Medical School - Department of Gastroenterology, Hepatology and Endocrinology, Onkologie Leer-Emden-Papenburg, Caritas Klinikum, University of Leipzig - Faculty of Medicine, Autonomous University of Barcelona - Institute of Oncology (VHIO), University of Rostock - University Medicine Rostock (UMR), Paracelsus Medical University Salzburg, Medical University of Innsbruck, Johannes Gutenberg University Mainz, Technische Universität München (TUM) - Institute of Pathology, KU Leuven and Technische Universität München (TUM)