1. Department of Radiation Oncology, Geneva University Hospital, Geneva, Switzerland
2. Department of Radiation Oncology, Tor Vergata General Hospital, University of Rome “Tor Vergata”, Rome, Italy
3. Radiation Oncology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
4. Radiotherapy and Radiosurgery Department, Humanitas Clinical and Research Center, Milan, Italy
5. Department of Biomedical Sciences, Humanitas University, Milan, Italy
6. Department of Surgical, Medical and Pediatric Sciences, University of Pavia, Pavia, Italy
7. Division of Radiotherapy, IEO European Institute of oncology, IRCCS, Milan, Italy
8. Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
9. Radiation Oncology section, Department of Surgical and Biomedical Sciences, University of Perugia, Perugia General Hospital, Perugia, Italy
10. Department of Radiation Oncology, Ghent University Hospital, Ghent, Belgium
11. Faculty of Medicine, Geneva University, Geneva, Switzerland