1. Graduate School of Oncological Radiotherapy, University of Palermo, Palermo, Italy
2. Radiaton Therapy Unit, Casa di Cura Macchiarella SpA, Palermo, Italy
3. Medical Oncology Unit, Ospedale Buccheri La Ferla Fatebenefratelli, Palermo, Italy
4. Department of Radiological Sciences, DIBIMED, University of Palermo, Palermo, Italy