[1] Royal Marsden Hosp, Dept Med, Sutton, Surrey, England
[2] Ist Ospitalieri Cremona, Div Med Oncol, Cremona, Italy
[3] Peter MacCallum Canc Ctr, Melbourne, Vic, Australia
[4] Univ Melbourne, Div Hematol & Med Oncol, Melbourne, Vic, Australia
[5] Dana Farber Canc Inst, Boston, MA 02115 USA
[6] Harvard Univ, Sch Med, Dept Med Oncol, Boston, MA USA
[7] Eli Lilly & Co, Global Hlth Outcomes, Indianapolis, IN 46285 USA
[8] ImClone Syst LLC, Global Stat Sci, Bridgewater, MA USA
[9] ImClone Syst LLC, Global Med Sci, Bridgewater, MA USA
[10] Eli Lilly & Co, Global Med Sci, Indianapolis, IN 46285 USA
[11] Vall dHebron Univ Hosp, Barcelona, Spain
[12] Univ Autonoma Barcelona, Dept Med Oncol, E-08193 Barcelona, Spain