[1] Univ Sheffield, Weston Pk Hosp, Sheffield, S Yorkshire, England
[2] Harvard Med Sch, Massachusettts Gen Hosp, Boston, MA USA
[3] Latin Amer Cooperat Oncol Grp, Porto Alegre, RS, Brazil
[4] Hosp Gen Univ Gregorio Maranon, Madrid, Spain
[5] Aichi Canc Ctr Hosp, Nagoya, Aichi, Japan
[6] Univ Calif Los Angeles, Jonsson Comprehens Canc Ctr, Los Angeles, CA 90024 USA
[7] Amgen Inc, Thousand Oaks, CA 91320 USA
[8] Breast Canc Res Ctr WA, Perth, WA, Australia
[9] Curtin Univ, Perth, WA, Australia