[1] Univ S Florida, Coll Med, H Lee Moffitt Canc Ctr & Res Inst, Dept Gastrointestinal Oncol, Tampa, FL 33612 USA
[2] Stanford Univ, Med Ctr, Dept Med, Div Oncol, Stanford, CA 94305 USA
[3] Northwestern Univ, Robert H Lurie Comprehens Canc Ctr, Chicago, IL 60611 USA
[4] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[5] Univ Kentucky, Markey Canc Ctr, Dept Internal Med, Div Med Oncol, Lexington, KY USA
[6] Rush Univ, Med Ctr, Chicago, IL 60612 USA
[7] SUNY Buffalo, Dept Surg, Buffalo, NY 14260 USA
[8] Univ Minnesota, Dept Med, Div Hematol Oncol & Transplantat, Minneapolis, MN 55455 USA
[9] Roswell Pk Canc Inst, Dept Med Oncol, Buffalo, NY 14263 USA
[10] Mt Sinai Sch Med, Dept Med Gastroenterol, New York, NY USA
[11] Mission Hlth Syst, Asheville, NC USA
[12] Karmanos Canc Inst, Dept Oncol, Detroit, MI USA
[13] Cedars Sinai Med Ctr, Samuel Oschin Canc Ctr, Los Angeles, CA 90048 USA
[14] Partnership Hlth Analyt Res LLC, Beverly Hills, CA USA