1. Department of Medicine I, University Hospital of Bonn, Bonn, Germany
2. Institute for Molecular Medicine and Experimental Immunology, University Hospital of the Rheinische Friedrich-Wilhelms-University, Bonn, Germany
3. Program of Immunology and Immunotherapy, Center for Applied Medical Research, University of Navarra, Pamplona, Spain
4. Department of Visceral Surgery, University Hospital of Bonn, Bonn, Germany
5. Department of Integrated Oncology (CIO), University Hospital of Bonn, Bonn, Germany