Affiliation: | 1. Departments of Radiation Oncology and Pathology, Instituto de Investigación Hospital de la Princesa, Madrid, Spain;2. Departments of Radiation Oncology and Pathology, Hospital Universitario Puerta de Hierro, Madrid, Spain;3. Department of Radiation Oncology, Hospital Universitario Ramón y Cajal, Madrid, Spain;4. Departments of Radiation Oncology and Pathology, Hospital Universitario Doce de Octubre, Madrid, Spain;5. Spanish National Research Council, Madrid, Spain |