[1] Ramon & Cajal Univ Hosp, Med Oncol Dept, Madrid, Spain
[2] HU Miguel Servet, Zaragoza, Spain
[3] Hosp Donostia, Med Oncol Dept, San Sebastian, Spain
[4] La Paz Univ Hosp, Dept Endocrinol, Madrid, Spain
[5] ICO Girona, Girona, Spain
[6] Hosp Univ Cent Asturias, Serv Oncol Med, Oviedo, Spain
[7] Corp Hosp Parc Tauli, Sabadell, Spain
[8] Hosp Rey Juan Carlos, Mostoles, Spain
[9] Hosp Gen Segovia, Serv Oncol Med, Segovia, Spain
[10] ICO Hosp Germans Trias & Pujol, Barcelona, Spain
[11] Inst Catala Oncol ICO Hosp, IDIBELL Head & Neck Canc Unit, Med Oncol Dept, Barcelona, Spain
[12] Hosp Clin Lozano Blesa, Zaragoza, Spain
[13] Hosp Valme, Seville, Spain
[14] Hosp Clin Barcelona, Barcelona, Spain
[15] Hosp Univ Virgen de la Victoria, Malaga, Spain
[16] Univ Hosptial Valladolid, Valladolid, Spain
[17] Vall de Hebron Univ Hosp, Endocrinol Dept, Barcelona, Spain
[18] Vall dHebron Univ Hosp, Barcelona, Spain