1 Department of Digestive Oncology, University Hospitals Gasthuisberg Leuven and KU Leuven, 49 Herestraat, Leuven, Belgium. eric.vancutsem@uzleuven.be.
2 Center for Observational and Real World Evidence, Merck & Co., Inc., Kenilworth, NJ, USA.
3 Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA.
4 Department of Medical Oncology, Vall d'Hebron University Hospital and Institute of Oncology, University Autònoma de Barcelona, Barcelona, Spain.
5 Department of Internal Medicine, Medical Oncology, and Clinical Trial Unit, Cerrahpaşa School of Medicine, Istanbul University-Cerrahpaşa, Istanbul, Turkey.
6 Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.
7 Department of Medical Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, South Korea.
8 Department of Clinical Oncology, Aichi Cancer Center Hospital, Nagoya, Japan.
9 North-German Trial Center for Innovative Oncology, Hematology Oncology Practice Eppendorf, University Cancer Center Hamburg, Hamburg, Germany.
10 Robert H. Lurie Comprehensive Cancer Center, Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
11 Department of Internal Medicine and Medical Oncology, University of Kansas, Westwood, KS, USA.
12 Department of Medicine and Hematology and Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
13 Department of Medical Oncology, Merck & Co., Inc., Kenilworth, NJ, USA.
14 Department of Gastrointestinal Oncology, National Cancer Center Hospital, Chiba, Japan.