[1] Vall dHebron Univ Hosp, Barcelona, Spain
[2] Inst Catala Oncol Badalona, Barcelona, Spain
[3] Hosp Virgen del Rocio, Seville, Spain
[4] Hosp Univ Marques de Valdecilla, Santander, Spain
[5] Inst Catala Oncol Hosp, Barcelona, Spain
[6] Hosp Univ 12 Octubre, Madrid, Spain
[7] HJM Morales Meseguer, Murcia, Spain
[8] Hosp Univ Burgos, Burgos, Spain
[9] Hosp Univ Madrid Sanchinarro, Madrid, Spain
[10] Hosp Univ Cent Asturias, Oviedo, Spain
[11] Hosp Univ Donostia, San Sebastian, Spain