[1] Hop St Antoine, Med Oncol, Paris, France
[2] MD Anderson Canc Ctr, Gastrointestinal Med Oncol, Houston, TX USA
[3] Ist Oncol Veneto IRCCS, Med Oncol, Padua, Italy
[4] Inst Canc Res & Treatment, Div Med Oncol, Dept Oncol Sci, Candiolo, Italy
[5] Univ Torino, Med Sch, Turin, Italy
[6] St Vincents Univ Hosp, Med Oncol, Dublin, Ireland
[7] Univ Sydney, Sydney Med Sch, Med Oncol, Sydney, NSW, Australia
[8] Duke Univ, Off Res Adm, Dept Surg, Durham, NC USA
[9] Inst Jules Bordet, Oncol, Gastroenterol, Brussels, Belgium
[10] Bristol Myers Squibb, Res & Dev, Princeton, NJ USA
[11] Bristol Myers Squibb, Res & Dev, Braine Lalleud, Belgium
[12] Bristol Myers Squibb, Res & Dev, Princeton, NJ USA
[13] MD Anderson Canc Ctr, GI Med Oncol, Houston, TX USA