[1] Icahn Sch Med Mt Sinai, Tisch Canc Inst, New York, NY 10029 USA
[2] Imperial Coll London, Hammersmith Hosp, Dept Surg & Canc, London, England
[3] Imperial Coll, London, England
[4] CHA Univ, Sch Med, CHA Bundang Med Ctr, Dept Med Oncol, Seongnam, South Korea
[5] Kindai Univ, Fac Med, Dept Gastroenterol & Hepatol, Osaka, Japan
[6] Univ Med Ctr Hamburg Eppendorf, Dept Internal Med 2, Hamburg, Germany
[7] Univ Med Ctr Hamburg Eppendorf, Dept Med 1, Hamburg, Germany
[8] Univ Kansas, Sch Med, Kansas City, KS USA
[9] Univ Texas Southwestern Med Ctr Dallas, Dept Internal Med, Dallas, TX 75390 USA
[10] Med Univ Vienna, Dept Internal Med 3, Div Gastroenterol & Hepatol, Vienna, Austria
[11] Med Univ Vienna, Dept Internal Med 3, Div Gastroenterol & Hepatol, Vienna, Austria
[12] Taipei Vet Gen Hosp, Bei Tou Qu, Taiwan
[13] Ist Clin Humanitas, Humanitas Canc Ctr, Rozzano, Italy
[14] Univ Pisa, Pisa, Italy
[15] Univ Oklahoma, Stephenson Canc Ctr, Oklahoma City, OK USA
[16] Univ Freiburg, Fac Med, Freiburg Univ,Med Ctr, Dept Med Gastroenterol Hepatol Endocrinol & Infec, Freiburg, Germany
[17] Hannover Med Sch, Hannover, Germany
[18] Univ Med Ctr Mainz, Mainz, Germany
[19] Roche, Basel, Switzerland