[1] Hosp Virgen Rocio, Seville, Spain
[2] Hosp Univ Fdn Alcorcon, Madrid, Spain
[3] Hosp Madrid Norte Sanchinarro, Dept Oncol, Madrid, Spain
[4] St Georg Hosp, Kogarah, NSW, Australia
[5] Hosp Badalona Germans Trias & Pujol, Catalan Inst Oncol, Oncol Serv, Barcelona, Spain
[6] Sydney Canc Ctr, Camperdown, NSW, Australia
[7] Amgen Inc, Oncol Therapeut, Thousand Oaks, CA 91320 USA
[8] Amgen Inc, Pharmacokinet & Drug Metab, Thousand Oaks, CA 91320 USA
[9] Ghent Univ Hosp, B-9000 Ghent, Belgium