1. National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
2. Weill Cornell Medical College, New York Presbyterian Hospital, 1305 York Avenue, Room Y1247, New York, NY 10065, USA
3. Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215-5450, USA
4. University Hospital of Nantes, Digestive Oncology, 1 Place Alexis Ricordeau, Nantes, 44000, France
5. Peking University Cancer Hospital & Institute, 52 Fucheng Road, Haidian District, Beijing, 100142, PR China
6. Institut du Cancer de Montpellier, 208 Avenue des Apothicaries, Montpellier, 34298, France
7. Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Seoul, Republic of Korea
8. Severance Hospital, Yonsei University Health System, 50-1 Yonsei-ro, Seoul, Republic of Korea
9. Istanbul University-Cerrahpaşa, Cerrahpaşa School of Medicine, Koca Mustafa Paşa Mahallesi, Cerrahpaşa Caddesi No. 53, Istanbul, 34096, Turkey
10. National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, 277-8577, Japan
11. Leningrad Regional Oncology Dispensary, Ulitsa Savushkina, 126, Saint Petersburg, 197374, Russian Federation
12. Vall d'Hebron University Hospital & Vall d'Hebron Institute of Oncology (VHIO), 119-129 Pg vall d'Hebron, Barcelona, 08035, Spain
13. Merck & Co., Inc., 2000 Galloping Hill Road, Kenilworth, NJ 07033, USA