[1]Moscow Hertzen Oncol Inst, Dept Oncol, Moscow, Russia;
[2]Chinese Acad Med Sci, Canc Inst & Hosp, Dept Oncol, Beijing 100730, Peoples R China;
[3]Prevoljskiy Reg Med Ctr, Dept Oncol, Novgorod, Russia;
[4]Fudan Univ, Dept Oncol, Shanghai Canc Ctr, Shanghai 200433, Peoples R China;
[5]Leningrad Reg Oncol Dispensary, Dept Oncol, St Petersburg, Russia;
[6]Beijing Union Med Coll Hosp, Dept Oncol, Beijing, Peoples R China;
[7]Zhejiang Univ, Sch Med, Affiliated Hosp 1, Dept Oncol, Hangzhou, Zhejiang, Peoples R China;
[8]Ctr Oncol, Dept Med Oncol, Sofia, Bulgaria;
[9]Ctr Invest Clin Clin Viedma, Dept Oncol, Viedma, Rio Negro, Argentina;
[10]Med Radiol Res Ctr, Dept Oncol, Obninsk, Russia;
[11]Ctr Pesquisas Oncol CEPON, Dept Oncol, Florianopolis, SC, Brazil;
[12]Crescent City Res Consortium, Dept Oncol, Marrero, LA USA;
[13]Novartis Oncol, Dept Oncol, E Hanover, NJ USA;
[14]Novartis Pharma SAS, Dept Oncol, Rueil Malmaison, France;
[15]Mem Sloan Kettering Canc Ctr, Dept Oncol, New York, NY 10021 USA