[1] Inst Gustave Roussy, Dept Med Oncol, Villejuif, France
[2] Vanderbilt Ingram Canc Ctr, Dept Oncol, Nashville, OH USA
[3] Univ Helsinki, Clin Trial Unit, Comprehens Canc Ctr, Cent Hosp, Helsinki, Finland
[4] Hosp Univ 12 Octubre, Dept Med Oncol, Madrid, Spain
[5] Bradford Hill Clin Ctr, Oncol, Santiago, Chile
[6] Vall dHebron Univ Hosp, Dept Oncol, Barcelona, Spain
[7] Fox Chase Canc Ctr, Med Oncol, Main Campus, Philadelphia, PA USA
[8] Fdn Policlin Univ Agostino Gemelli IRCCS, Med Oncol, Rome, Italy
[9] Univ Colorado, Internal Med, Med Oncol, UCHealth Canc Care,Canc Ctr, Anschutz Med Campus, Aurora, CO USA
[10] Fdn IRCCS Ist Nazl Tumori, Med Oncol, Milan, Italy
[11] Istanbul Medeniyet Univ, Prof Dr Suleyman Yalcin City Hosp, Dept Med Oncol, Istanbul, Turkiye
[12] Univ Chicago, Ctr Canc, Med Ctr, Chicago, IL USA
[13] BC Canc Agcy, Dept Med Oncol, Vancouver, BC, Canada
[14] Univ Hosp Olomouc, Dept Oncol, FN Olomouc, Olomouc, Czech Republic
[15] NHS Greater Glasgow & Clyde, Dept Med Oncol, BWSCC Beatson West Scotland Canc Ctr, Glasgow, Lanark, Scotland
[16] Merck & Co Inc, Biostat, Rahway, NJ USA
[17] Merck & Co Inc, Dept Oncol, Corp Headquarters, Whitehouse Stn, NJ USA
[18] Merck & Co Inc Rahway, Oncol Clin Dev, Rahway, NJ USA
[19] St Bartholomews Hosp Barts Hlth NHS Trust, Dept Oncol, London, England
[20] Dana Farber Canc Inst, Dept Med Oncol, Boston, MA USA