Univ Adelaide, Queen Elizabeth Hosp, Woodville, SA 5011, Australia; Amgen Inc, Seattle, WA USA; Univ Antwerp Hosp, Edegem, Belgium; Univ Antwerp, Edegem, Belgium; Univ Ulsan, Dept Oncol, Asan Med Ctr, Coll Med, Seoul, South Korea; Fudan Univ, Canc Hosp Shanghai, Shanghai 200433, Peoples R China; Univ Politecn Marche, Clin Oncol Med, AO Osped Riuniti, Ancona, Italy; Univ Witwatersrand, Johannesburg, South Africa; Apollo Hosp, Hyderabad, Andhra Pradesh, India; Leicester Royal Infirm, Leicester, Leics, England; RAMS, NN Blokhin Canc Res Ctr, Moscow, Russia; Amgen Inc, Thousand Oaks, CA 91320 USA; Amgen Inc, San Francisco, CA USA