[1] Hosp St Joan Despi, Med Oncol Dept, Inst Catala Oncol, ICO Hosp, Carrer Jacint Verdaguer 90, Barcelona 08970, Spain
[2] Hosp Univ Doce Octubre, Med Oncol Dept, Madrid, Spain
[3] Hosp Univ Bellvitge, Pathol Dept, Barcelona, Spain
[4] Hosp Clin San Carlos, Pathol Dept, Madrid, Spain
[5] Hosp Univ Leon, Med Oncol Dept, Leon, Spain
[6] Hosp Santa Creu & Sant Pau, Pathol Dept, Barcelona, Spain
[7] Hosp Univ Virgen Macarena, Med Oncol Dept, Seville, Spain
[8] Hosp Univ A Coruna, Pathol Dept, La Coruna, Spain
[9] Inst Catala Oncol, Med Oncol Dept, Barcelona, Spain
[10] Hosp Univ Arnau de Vilanova Lleida, Pathol Dept, Barcelona, Spain
[11] Hosp Univ Bellvitge, IRBLLEIDA, IDIBELL, CIBERONC, Barcelona, Spain