1. Danish Centre for Particle Therapy, Aarhus University Hospital, Aarhus, Denmark
2. Data Science, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
3. Department of Radiotherapy, Azienda Sanitaria dell’Alto Adige, Bolzano, Italy
4. Department of Radiation Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
5. Department of Radiotherapy, Ospedale Regionale Parini-AUSL Valle d’Aosta, Aosta, Italy
6. Department of Radiotherapy, IRCCS Istituto Tumori ‘Regina Elena’, Rome, Italy
7. Department of Radiotherapy, Humanitas Gavazzeni, Bergamo, Italy
8. Department of Radiotherapy, Azienda Ospedaliero Universitaria S. Maria della Misericordia, Udine, Italy
9. Department of Radiotherapy, ASL TO4 Ospedale di Ivrea, Ivrea, Italy
10. Department of Radiotherapy, Ospedale degli Infermi, Biella, Italy
11. Department of Radiotherapy, Istituto di Candiolo – Fondazione del Piemonte per l‘Oncologia IRCCS, Candiolo, Italy
12. Department of Radiotherapy, IRCCS CROB, Rionero in Vulture, Italy
13. Department of Health Physics, Provincial Hospital of Bolzano (SABES-ASDAA), Bolzano-Bozen, Italy; Lehrkrankenhaus der Paracelsus Medizinischen Privatuniversität
14. Department of Medical Physics, IRCCS San Raffaele Scientific Institute, Milan, Italy
15. Department of Radiotherapy, San Raffaele Scientific Institute and Università Vita Salute San Raffaele, Milan, Italy
16. Department of Radiation Oncology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
17. Department of Radiotherapy, IRCCS San Raffaele Scientific Institute, Milan, Italy