1. Medical Oncology Department, Biomedical Research Institute INCLIVA, Hospital Clínico de Valencia, Universidad de Valencia, Valencia, Spain
2. CIBERONC, Instituto de Salud Carlos III, Madrid, Spain
3. Medical Oncology Department, Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), UVic-UCC, IOB-Quiron, Barcelona, Spain
4. Medical Oncology Department, Hospital Universitario 12 de Octubre, Imas12, UCM, CIBERONC, Madrid, Spain
5. Medical Oncology Department, Hospital Clínico San Carlos, Madrid, Spain
6. Medical Oncology Department, Hospital Universitario La Paz, IDIPAZ, CIBERONC, Cátedra UAM-AMGEN, Madrid, Spain
7. Medical Oncology Department, Hospital Universitario Ramón y Cajal, IRYCIS, Madrid, Spain
8. Medical Oncology Department, Hospital Universitario Lucus Augusti, Lugo, Spain
9. Medical Oncology Department, Hospital San Pedro de Alcántara, Cáceres, Spain