1. The II Medical Clinic, Department of Oncology, Hematology & BMT with section of Pneumology, University Medical Center of Hamburg-Eppendorf, Hamburg, Germany
2. Department of Precision Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
3. Medical Oncology Unit, Diaconesses-Croix St Simon Hospital, Paris, France
4. Groupe d'Oncologie Radiothérapie Tête Et Cou (GORTEC), Tours, France
5. Department of Medical Oncology, West German Cancer Center, University Hospital Essen, Essen, Germany
6. Department of Oncology, Odense University Hospital, Odense, Denmark
7. Medical Oncology, Comprehensive Cancer Center, AUSL-IRCCS of Reggio Emilia, Reggio Emilia, Italy
8. Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan
9. Department of Gastroenterology & Gastrointestinal Oncology, National Cancer Center Hospital East, Kashiwa, Japan
10. Central European Cooperative Oncology Group, Vienna, Austria
11. Merck Healthcare KGaA, Darmstadt, Germany
12. Medical Oncology Department, Vall d'Hebron Hospital Campus & Institute of Oncology (VHIO), IOB-Quiron, UVic-UCC, Barcelona, Spain