[1] Univ Hosp Puerta Hierro Majadahonda, Med Oncol Dept, Majadahonda, Spain
[2] Biomed Res Inst Malaga IBIMA, Med Oncol, Malaga, Spain
[3] Complejo Hosp Univ Insular Materno Infant, Las Palmas Gran Canaria, Spain
[4] Natl & Kapodistrian Univ, Athens, Greece
[5] Frontier Sci Fdn Hellas, Athens, Greece
[6] Hosp Reg Univ Malaga Carlos Haya, Oncol Med, Malaga, Spain
[7] Hosp Univ Virgen Rocio, Med Oncol, Seville, Spain
[8] Hosp Clin Univ Valladolid, Radiat & Med Oncol Dept, Valladolid, Spain
[9] Hosp Gen Univ Alicante, Med Oncol Dept, Alicante, Spain
[10] Clin Univ Salamanca, Oncol Hosp, Salamanca, Spain
[11] Inst Invest Biomed A Coruna INIBIC, Dept Med Oncol, La Coruna, Spain
[12] Hosp Gen Univ Elche, Elche, Spain
[13] Hosp Gen Univ Valencia, Valencia, Spain
[14] Hosp Univ Jaen, Med Oncol Dept, Jaen, Spain
[15] Hosp Clin Univ San Carlos, Med Oncol Dept, Madrid, Spain
[16] Consorcio Hosp Prov Castellon, Med Oncol Dept, Castellon La Plana, Spain
[17] Hosp Univ Alvaro Cunqueiro, Vigo, Spain
[18] Hosp Univ Basurto, Bilbao, Spain
[19] Hosp Univ & Politecn La Fe, Dept Med Oncol, Valencia, Spain