1Department of Medical Oncology, Hospital Universitario Lucus Augusti, Lugo, Spain. sergio.vazquez.estevez@sergas.es.
2Department of Medical Oncology, Hospital Arnau de Vilanova, Valencia, Spain.
3Department of Medical Oncology, HM Hospitales, Madrid, Spain.
4Department of Medical Oncology, Hospital Clínico Universitario Lozano Blesa, Saragossa, Spain.
5Complejo Asistencial Universitario de León, IBIOLEÓN, León, Spain.
6Department of Medical Oncology, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain.
7Department of Medical Oncology, Hospital Universitario Virgen de La Victoria, Málaga, Spain.
8Department of Medical Oncology, Hospital de Guadalajara, Guadalajara, Spain.
9Department of Oncology, Parc Taulí Hospital Universitari, Institut d'Investigació I Innovació Parc Taulí (I3PT)-CERCA, Sabadell, Barcelona, Spain.
10Department of Oncology, Hospital Universitario de Navarra, Navarra, Spain.
11Department of Oncology, Hospital Universitario de Jerez de La Frontera, Cádiz, Spain.
12Department of Oncology, Hospital Universitario Galdakao-Usansolo, Bizkaia, Spain.