1. Fondazione Istituto Oncologico del Mediterraneo, Catania, Italy
2. Radiation Oncology Unit – Department of Biomedical, Dental Science and Morphological and Functional Images, University of Messina, Messina, Italy
3. REM Radioterapia srl, Fondazione Istituto Oncologico del Mediterraneo, Viagrande, Italy
4. Radiation Oncology Unit, A.O.U. “G. Martino”, Messina, Italy