1. Department of Radiation Oncology, Hospital Universitario Ramón y Cajal, Madrid, 28034, Spain
2. Department of Radiation Oncology, Consorci Sanitari de Terrassa, Hospital de Terrassa, Barcelona, 08227, Spain
3. Department of Radiation Oncology, Complejo Hospitalario de Santiago, Santiago de Compostela, 15706, Spain
4. Department of Radiation Oncology, Hospital Universitario La Paz, Madrid, 28046, Spain
5. Department of Radiation Oncology, Hospital Regional Universitario de Málaga, Málaga, 29010, Spain
6. Department of Radiation Oncology, Hospital Universitario Puerta de Hierro, Majadahonda, Madrid, 28222, Spain
7. Department of Radiation Oncology, Complejo Hospitalario Universitario de Vigo, Hospital Meixoeiro, Vigo, 36313, Spain
8. Medical Affairs Department, Angelini Pharma España, S.L.U., Barcelona, 08034, Spain
9. Department of Radiation Oncology, Hospital La Milagrosa, Madrid, 28010, Spain