[1] Massachusetts Gen Hosp, Ctr Canc, Boston, MA USA
[2] Hop St Antoine, Oncol Med, Paris, France
[3] Natl Canc Ctr Hosp East, Gastroenterol & Gastrointestinal Oncol, Chiba, Japan
[4] Sarah Cannon Res Inst, GI Oncol Res, Nashville, TN USA
[5] Univ Calif San Francisco, Helen Diller Family Comprehens Canc Ctr, San Francisco, CA 94143 USA
[6] Netherlands Canc Inst, Clin Pharmacol, Amsterdam, Netherlands
[7] Inst Gustave Roussy, Med, Villejuif, France
[8] Univ North Carolina Chapel Hill, GI Med Oncol, Chapel Hill, NC USA
[9] Univ Milan, Niguarda Canc Ctr, Osped Niguarda, Milan, Italy
[10] Univ Birmingham, Sch Canc Sci, Birmingham, W Midlands, England
[11] Pinnacle Oncol Hematol, Div Arizona Ctr Canc Care, Scottsdale, AZ USA
[12] St Luc Univ Hosptial, Dept Med Oncol, Brussels, Belgium
[13] Aichi Canc Ctr Hosp, Dept Clin Oncol, Nagoya, Aichi, Japan
[14] Vall Hebron Univ Hosp, Med Oncol, Barcelona, Spain
[15] Mem Sloan Kettering Canc Ctr, Gastrointestinal Oncol, 1275 York Ave, New York, NY 10021 USA
[16] Amgen Inc, Hematol Oncol, Thousand Oaks, CA 91320 USA
[17] Novartis Pharma AG, Global Oncol, Basel, Switzerland
[18] Novartis Inst Biomed Res Inc, Biomarkers & Diagnost Biometr, Boston, MA USA
[19] Novartis Pharmaceut, Global Oncol, East Rutherford, NJ USA
[20] Univ Hosp Leuven, Digest Oncol, Leuven, Belgium