1. Division of Radiation Oncology, University Hospital “Maggiore della Carità”, 28100 Novara, Italy
2. Department of Translational Medicine, University of the Eastern Piedmont, 28100 Novara, Italy
3. Department of Medical Physics, University Hospital “Maggiore della Carità”, 28100 Novara, Italy
4. Division of Medical Oncology, University Hospital “Maggiore della Carità”, 28100 Novara, Italy
5. Division of Surgery, Hospital ‘S.S. Trinita’, 28021 Borgomanero, Italy
6. Division of Radiology, University Hospital “Maggiore della Carità”, 28100 Novara, Italy
7. Radiation Oncology, Veneto Institute of Oncology IOV-IRCCS, 35100 Padua, Italy
8. Department of Surgery, Oncology and Gastroenterology, University of Padova, 35100 Padua, Italy