[1] Vall dHebron Univ Hosp, Dept Med Oncol, Barcelona, Spain
[2] Sarah Cannon Res Inst, Nashville, TN USA
[3] Royal Marsden Hosp, Surrey, England
[4] Inst Canc Res, Surrey, England
[5] Inst Gustave Roussy, Villejuif, France
[6] Dana Farber Canc Inst, Boston, MA 02115 USA
[7] Hosp Clin, Dept Med Oncol, Colorectal Unit, Dept Surg, Valencia, Spain
[8] Genentech Inc, San Francisco, CA 94080 USA
[9] Univ Valencia, Dept Hematol & Med Oncol, INCLIVA, Valencia, Spain
[10] Massachusetts Gen Hosp, Boston, MA 02114 USA
[11] Sarah Cannon Res Inst Tennessee Oncol PLLC, Nashville, TN USA