[1] Hosp Puerta de Hierro, Madrid, Spain
[2] Hosp Univ Carlos Haya, Malaga, Spain
[3] Complexo Xeral Calde, Lugo, Spain
[4] Complexo Hosp Ourense, Orense, Spain
[5] Hosp Gen Elda, Elda, Spain
[6] Hosp Univ Reina Sofia, Dept Clin Oncol, Cordoba, Spain
[7] Hosp Univ Canarias, Santa Cruz De Tenerife, Spain
[8] Hosp Prov Castellon, Castellon de La Plana, Spain
[9] Hosp Son Llatzer, Palma De Mallorca, Spain
[10] Hosp Donostia, San Sebastian, Spain