[1] Massachusetts Gen Hosp, Ctr Canc, Boston, MA USA
[2] PUCRS Sch Med, Porto Alegre, RS, Brazil
[3] Curtin Univ, Mt Hosp, Perth, WA 6845, Australia
[4] Aichi Canc Ctr Hosp, Dept Breast Oncol, Nagoya, Aichi 464, Japan
[5] Univ Complutense, Inst Invest Sanitaria Gregario Maranon, E-28040 Madrid, Spain
[6] Amgen Inc, Thousand Oaks, CA 91320 USA
[7] YCR Sheffield Canc Res Ctr, Canc Res UK Inst Canc Studies, Sheffield, S Yorkshire, England