1. Hospital Universitario de Salamanca, Salamanca, Spain;
2. University Hospital of Salamanca/IBSAL, Salamanca, Spain;
3. Clinica Universitaria de Navarra, Pamplona, Spain;
4. Hospital Virgen del Rocio, Sevilla, Spain;
5. Hospital Universitario Germans Trias i Pujol, Barcelona, Spain;
6. Hospital de la Fe, Valencia, Spain;
7. MD Anderson Cancer Center, Madrid, Spain;
8. PharmaMar, Madrid, Spain;
9. Institut Gustave Roussy, Villejuif, France;
10. Institut Goustave Roussy, Villejuif, France;