1. The University at Hong Kong, Hong Kong, China;
2. Asan Medical Center, University of Ulsan, Seoul, South Korea;
3. Seoul National University, Seoul, South Korea;
4. USC Norris Comprehensive Cancer Center, Los Angeles, CA;
5. Istituto Clinico Humanitas, Rozzano, Italy;
6. Clinica Universidad de Navarra and CIBEREHD, Pamplona, Spain;
7. Universidad de Navarra, Pamplona, Spain;
8. Kindai University Faculty of Medicine, Osaka, Japan;
9. Chang Gung Memorial Hospital, Taipei, Taiwan;
10. Servicio de Digestivo, Hospital General Universitario Gregorio Marañón, Madrid, Spain;
11. Department of Medical & Surgical Sciences, University of Bologna, Bologna, Italy;
12. Princess Margaret Cancer Centre, Toronto, ON, Canada;
13. Georgetown University Hospital, Washington DC, DC;
14. Emory University Winship Center, Atlanata, GA;
15. Fundación de Investigación, San Juan, PR;
16. Bristol-Myers Squibb, Princeton, NJ;
17. National Taiwan University Hospital, Taipei, Taiwan;