[1] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[2] Vall dHebron Univ Hosp, Barcelona, Spain
[3] Ctr Onkol Inst Merii Sk, Gliwice, Poland
[4] Warszawski Uniwersytet Med, Warsaw, Poland
[5] Austin Hosp, Heidelberg, Vic 3084, Australia
[6] Thomas Jefferson Univ, Kimmel Canc Ctr, Philadelphia, PA 19107 USA
[7] Krasnodar City Oncol Ctr, Krasnodar, Russia
[8] Amgen Inc, Thousand Oaks, CA USA
[9] Amgen Inc, Uxbridge, Middx, England
[10] Univ Hosp Gasthuisberg, Dept Digest Oncol, B-3000 Louvain, Belgium