1. University Hospital Germans Trias i Pujol-ICO, Barcelona, Spain
2. Alicante University Hospital, Alicante, Spain
3. Hospital 12 de Octubre, Madrid, Spain
4. Hospital Clínico, Universitario Lozano Blesa, Zaragoza, Spain
5. Hospital Universitario Ramon y Cajal, Medical Oncology Department, Madrid, Spain
6. Institut Català d'Oncologia, Hospital Universitario German Trias i Pujol, Badalona, Spain
7. Medical Oncology Department, University Reina Sofia Hospital, Biomedical Research Institute Maimonidas, Cordoba, Spain
8. Hospital General de Valencia, Valencia, Spain
9. Department of Medical Oncology, Elche General University Hospital, Alicante, Spain
10. Hospital Universitario Clínico San Carlos, Madrid, Spain
11. Hospital de Sabadell, Corporació Sanitària Parc Taulí, Sabadell, Spain
12. Complejo Hospitalario de Jaén, Jaén, Spain
13. Hospital Universitario Marqués de Valdecilla, Santander, Spain
14. Hospital de Hospitalet, Barcelona, Spain
15. Oncology Service, Complejo Hospitalario Universitario A Coruña, A Coruña, Spain
16. Hospital Virgen de las Nieves, Granada, Spain
17. Hospital General Universitario, Alicante, Spain
18. Reina Sofía University Hospital, Córdoba, Spain