[1] IDIVAL, Inst Invest Valdecilla, Santander, Cantabria, Spain
[2] Hosp Univ Marques de Valdecilla, Santander, Cantabria, Spain
[3] IBBTEC, Inst Biomed & Biotecnol Cantabria, Santander, Cantabria, Spain
[4] Hosp Donostia, San Sebastian, Spain
[5] Hosp Univ 12 Octubre, Madrid, Spain
[6] Hosp Univ 12 Octubre, Serv Oncol Med, Madrid, Spain
[7] Inst Valenciano Oncol, Valencia, Spain
[8] Hosp Clin Univ San Carlos, Med Oncol Dept, Madrid, Spain
[9] Hosp Univ Marques de Valdecilla, Dept Med Oncol, Santander, Cantabria, Spain