1. Radiation Oncology, ARNAS Civico Hospital, 90100 Palermo, Italy
2. Radiotherapy Unit, Cannizzaro Hospital, 95100 Catania, Italy
3. Radioterapia Oncologica, Villa Santa Teresa, 90100 Palermo, Italy
4. RI.MED Foundation, 90100 Palermo, Italy
5. Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, Molecular and Clinical Medicine, University of Palermo, 90100 Palermo, Italy
6. Radiotherapy Unit, AOU Policlinico-VE, 95100 Catania, Italy
7. Radiotherapy Unit, Casa di Cura Macchiarella, 90100 Palermo, Italy
8. Radiation Oncology Unit, REM Radioterapia, 95100 Viagrande, CT, Italy
9. Radiation Oncology Unit, La Maddalena Dipartimento Oncologico di III Livello, 90100 Palermo, Italy
10. Department of Radiological Science, University of Messina, 98121 Messina, Italy