[1] Hosp Univ Puerta de Hierro Majadahonda, Inst Invest Sanitaria Puerta de Hierro Majadahond, Serv Oncol Med, Madrid, Spain
[2] Inst Catala Oncol, Med Oncol, Barcelona, Spain
[3] Hosp Clin Univ, Clin Fdn Incliva, Valencia, Spain
[4] Hosp Univ A Coruna, La Coruna, Spain
[5] Hosp Univ Vigo, Pontevedra, Spain
[6] Hosp Fdn Jimenez Iis Fjd, Madrid, Spain
[7] Hosp La Santa Creu & St Pau, Barcelona, Spain
[8] Hosp Insular Gran Canaria, Las Palmas Gran Canaria, Spain
[9] Vall Dhebron Univ Hosp, Barcelona, Spain
[10] Inst Oncol Vhio, Barcelona, Spain
[11] Hosp Univ La Paz, Madrid, Spain
[12] Univ Hosp Reg Malaga, Malaga, Spain
[13] Hosp Univ Cruces, Baracaldo, Spain
[14] Hosp Univ Salamanca, Salamanca, Spain
[15] Hosp Univ Virgen Del Rocio, Seville, Spain
[16] Clin Hosp, Oncol, Barcelona, Spain
[17] Hosp Univ Reina Sofia, Cordoba, Spain
[18] Hosp Univ Quiron Dexeus, Inst Oncol Dr Rosell, Grp Quironsalud, Barcelona, Spain
[19] Hosp Gen Alicante, Alicante, Spain