1. Division of Radiation Oncology, European Institute of Oncology IRCCS (IEO), 20141 Milan, Italy
2. Department of Translational Medicine, University of Piemonte Orientale (UPO), 13100 Novara, Italy
3. Radiation Oncology Department, ASST Spedali Civili and University of Brescia, 25123 Brescia, Italy
4. Radiotherapy Unit, ARNAS Civico Hospital, 90127 Palermo, Italy
5. Casa di cura Macchiarella, U.O. Radioterapia Oncologica, 90127 Palermo, Italy
6. Radiation Oncology Department, ‘S.M. Della Misericordia’ Hospital, AULSS 5 Veneto, 45100 Rovigo, Italy
7. Department of Biomedical, Dental and Morphological and Functional Imaging Sciences, University of Messina, 98122 Messina, Italy
8. Radiation Oncology Unit, A.O.U. Policlinico “G. Martino” Messina, 98124 Messina, Italy
9. Department of Radiotherapy and Radiosurgery, IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Milan, Italy
10. Department of Biomedical Sciences, Humanitas University, 20090 Pieve Emanuele, Italy
11. Department of Oncology and Hemato-Oncology, University of Milan, 20122 Milan, Italy