1. Hospital Universitario 12 de Octubre, Madrid, Spain
2. Medical Oncology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
3. Hospital Universitario La Paz, Madrid, Spain
4. Ramón y Cajal University Hospital, Madrid, Spain
5. Pfizer, Madrid, Spain
6. General University Hospital of Asturias, Asturias, Spain
7. Hospital Universitario Son Espases, Palma de Mallorca, Spain
8. Instituto Valenciano de Oncología, Valencia, Spain
9. Hospital General Universitario Gregorio Marañón, Madrid, Spain
10. Medical Oncology, Hospital Universitario Reina Sofia, Córdoba, Spain
11. Hospital de Valme, Sevilla, Spain
12. Juan Canalejo University Hospital, La Coruña, Spain
13. Hospital General Yague, Burgos, Spain
14. Hospital de Segovia, Spain
15. Parc Taulí Hospital Universitari, Sabadell, Spain
16. Trial Form Support, Madrid, Spain
17. 17HM Hospitales, Centro Integral Oncológico HM Clara Campal, Madrid, Spain