1. Department of Medical Oncology, Hospital Universitario Doce de Octubre, Madrid, Spain
2. Department of Hematology & Medical Oncology, Hospital Universitario Morales Meseguer, UMU, IMIB, Murcia, Spain
3. Department of Medical Oncology, Hospital Universitario Central de Asturias, Oviedo, Spain
4. Department of Medical Oncology, Hospital Universitario Vall d'Hebron, Barcelona, Spain
5. Department of Pathology, Hospital Universitario de Fuenlabrada, Madrid, Spain
6. Department of Medical Oncology, Hospital Universitario Virgen del Rocío, Sevilla, Spain
7. Department of Endocrinology, Complejo Asistencial Universitario de Burgos, Burgos, Spain
8. Department of Medical Oncology, Instituto Catalán de Oncología, Hospital Universitario Duran i Reynalds, Barcelona, Spain
9. Department of Medical Oncology, Hospital Universitario Miguel Servet, Zaragoza, Spain
10. Department of Medical Oncology, Hospital Universitario la Paz, Madrid, Spain
11. Department of Endocrinology, Hospital Universitario la Princesa, Madrid, Spain
12. Department of Medical Oncology, Hospital Universitario La Fe, Valencia, Spain
13. Department of Surgery, Hospital de Donostia, San Sebastian, Spain
14. Department of Medical Oncology, Hospital Universitario de Canarias, Tenerife, Spain
15. Department of Oncology, Hospital de Basurto, Bilbao, Spain
16. Department of Endocrinology, Hospital Clínico Universitario San Carlos, Madrid, Spain
17. Department of Medical Oncology, Hospital Universitario Virgen de la Victoria, Málaga, Spain
18. Department of Medical Oncology, Hospital Universitario Marqués de Valdecilla, Santander, Spain
19. Department of Medical Oncology, Hospital Ramón y Cajal, Madrid, Spain
20. Instituto de Investigación Hospital 12 de Octubre (i+12), Centro Nacional de Investigacion Oncologica (CNIO), CIBERONC, Universidad Complutense de Madrid (UCM), Madrid, Spain