1 Radiation Oncology, Azienda Ospedaliero-Universitaria Careggi, University of Florence, Florence, Italy.
2 Radiation Oncology Clinical Department, National Center for Oncological Hadrontherapy, Pavia, Italy.
3 Medical Oncology Unit, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health-Medical Oncology, University of Brescia, ASST-Spedali Civili, Brescia 25123, Italy. Electronic address: [email protected].