[1] UCM, Hosp Univ 12 Octubre, CNIO, Imas12, Madrid, Spain
[2] Hosp Univ Virgen del Rocio, Seville, Spain
[3] Hosp Univ Cent Asturias, Oviedo, Asturias, Spain
[4] 12 Octubre Univ Hosp, Madrid, Spain
[5] Hosp Ramon & Cajal, Madrid, Spain
[6] Inst Catala Oncol, Barcelona, Spain
[7] Hosp Univ La Paz, Madrid, Spain
[8] Ist Nazl Tumori Fdn G Pascale, Naples, Italy
[9] Hosp Univ Donostia, San Sebastian, Spain
[10] IRCCS, European Inst Oncol, Milan, Italy
[11] Marques Valdecilla Univ Hosp, Santander, Spain
[12] Ist Sci Romagnolo Studio & Cura Tumori IRST IRCCS, Osteoncol & Rare Tumors Ctr, Ist Scientifico Romagnolo Studio Cura Tumori IRST, Meldola, Italy
[13] Complexo Hosp Univ Vigo, Vigo, Spain
[14] Hosp Gen Univ Valencia, Valencia, Spain
[15] Hosp Gen Univ Gregorio Maranon, Madrid, Spain
[16] Hosp Virgen de las Nieves, Granada, Spain
[17] MD Anderson Canc Ctr Madrid, Madrid, Spain
[18] Hosp Univ Burgos, Burgos, Spain
[19] Vall dHebron Univ Hosp, Vall dHebron Inst Oncol VHIO, Dept Med Oncol, Barcelona, Spain