1. Department of Medical Physics, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Giuseppe Massarenti 9, 40138 Bologna, Italy
2. Scientific Direction, IRCCS Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
3. Medical Physics Unit, Bambino Gesù Children’s Hospital, IRCCS, P.zza Sant’Onofrio 4, 00165 Rome, Italy