[1] Vall Dhebron Univ Hosp, Barcelona, Spain
[2] Oslo Univ Hosp, Oslo, Norway
[3] Norwegian Radium Hosp, Oslo Univ Hosp, Inst Canc Res, Oslo, Norway
[4] Hosp Clin Barcelona, Barcelona, Spain
[5] Hosp 12 Octubre, Carretera Andalucia, Madrid, Spain
[6] Catalan Inst Oncol Badalona, Med Oncol, Badalona, Spain
[7] Hosp Badalona Germans Trias & Pujol, Badalona, Spain
[8] B Argo, Badalona, Spain
[9] Hosp Univ Fdn Jimenez Diaz, Madrid, Spain
[10] Hosp Virgen de La Victoria, Malaga, Spain
[11] Hosp del Mar, Oncol, Barcelona, Spain
[12] Univ Hosp A Coruna Xxiac Sergas, Med Oncol Serv, La Coruna, Spain
[13] Kings Coll London, Guys Hosp, London, England
[14] Med Coll Wisconsin, Affiliated Hosp, Menomonee Falls, WI USA
[15] Complejo Hosp Jaen, Med Oncol, Jaen, Spain
[16] Bergenbio Asa, Bergen, Norway
[17] Merck & Co Inc, Kenilworth, NJ USA
[18] Merck & Co Inc, Rahway, NJ 07065 USA
[19] Christie NHS Fdn Trust, Manchester Acad Hlth Sci Ctr, Manchester, Lancs, England
[20] Univ Manchester, Manchester, Lancs, England