1 Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, General Surgery 1, Fondazione IRCCS Policlinico San Matteo, Italy. Electronic address: l.cobianchi@smatteo.pv.it.
2 Centro Nazionale Adroterapia Oncologica (CNAO), Pavia, Italy; Radiotherapy Division, IEO, Milan, Italy.
3 Department of Clinical, Surgical, Diagnostic and Paediatric Sciences, University of Pavia, General Surgery 1, Fondazione IRCCS Policlinico San Matteo, Italy.
4 Department of Onco-Hematology, Oncology Section, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
5 Division of Pathology, Department of Molecular Medicine, University of Pavia, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
6 Centro Nazionale Adroterapia Oncologica (CNAO), Pavia, Italy.