1 National Center of Oncological Hadrontherapy (Fondazione CNAO), Pavia, Italy.
2 Department of Radiation Oncology, IRCCS Policlinico San Matteo Foundation and University of Pavia, Pavia, Italy.
3 Lincoln International Business School, University of Lincoln, UK.
4 General Surgery Clinic, IRCCS Policlinico San Matteo Foundation, and Department of Diagnostic and Pediatric Science, University of Pavia, Pavia, Italy.
5 Department of Radiation Oncology, IRCCS Ospedale Policlinico San Martino, and Department of Health Science, University of Genoa, Genoa, Italy.
6 Department of Surgery and Cancer, Imperial College London, London, UK.