1. Seoul National University College of Medicine, 101 Daehak-ro, Ihwa-Dong, Seoul, Republic of Korea
2. University Hospitals Gasthuisberg Leuven & KU Leuven, 49 Herestraat, Leuven 3001, Belgium
3. Yale Cancer Center and Smilow Cancer Hospital, 333 Cedar Street, New Haven, CT 06510, USA
4. National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
5. Vall d'Hebron University Hospital & Institute of Oncology (VHIO), Vall d'Hebron 119–129, 08035 Universitat Autònoma de Barcelona, Barcelona, Spain
6. Memorial Sloan Kettering Cancer Center, 300 East 66th Street, BAIC 1031, New York, NY 10065, USA
7. Yonsei Cancer Hospital, Yonsei University Health System, 50-1 Yonsei-Ro Seodaemun-gu, Seoul 03722, Republic of Korea
8. Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY 10065, USA
9. Institute of Clinical Cancer Research, UCT University Cancer Center Frankfurt, Steinbacher Hohl 2-26, Frankfurt 60488, Germany
10. National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
11. Merck & Co., Inc., 2000 Galloping Hill Road, Kenilworth, NJ 07033, USA