1. Department of Medical Oncology; Klinikum Grosshadern and Comprehensive Cancer Center, University of Munich; Munich Germany
2. Department of Internal Medicine I; Hospital Nordoberpfalz; Weiden Germany
3. Department of Internal Medicine II; Department of Medical Oncology; University of Würzburg; Würzburg Germany
4. Department of Gastroenterology; Hepatology and GI-Oncology; Hospital Bogenhausen; München Germany
5. Department of Medical Oncology; Gastroenterology and Internal Medicine; Hospital Esslingen; Esslingen Germany
6. Center of Oncology; Landshut Germany
7. Department of Medical Oncology and Hematology; Hospital Barmherzige Brüder; Regensburg Germany
8. Department of Internal Medicine I; University of Erlangen; Germany
9. University Cancer Center, Krankenhaus Nordwest; Frankfurt Germany
10. Department of Hematology and Medical Oncology; Klinikum Traunstein; Traunstein Germany
11. Department of Internal Medicine II; Hospital Neumarkt i.d.OPf; Neumarkt i.d.OPf Germany
12. Department of Surgery; Hospital Magdeburg; Magdeburg Germany