1. Radiation Oncology Department, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
2. Department of Oncology, Radiation Oncology, University of Torino, Turin, Italy
3. Department of Radiation Oncology, University of Munich, Munich, Germany
4. Medical Physics Department, Ospedale Regionale `U. Parini’, AUSL Valle d’Aosta, Aosta, Italy
5. Department of Oncology, Odense University Hospital, Odense, Denmark
6. Radiation Oncology Department, Catalan Institute of Oncology, L’Hospitalet de Llobregat, Barcelona, Spain.
7. Radiation Oncology Department, Cruces University Hospital, Barakaldo, Vizcaya, Spain
8. Radiotherapy Department, Portuguese Institute of Oncology of Lisbon, Lisbon, Portugal
9. Radiotherapy Department, Champalimaud Centre for the Unknown (CCU), Lisbon, Portugal
10. Radiation Oncology Department, Hopitaux Universitaires de Genève, Geneva, Switzerland
11. Advanced Department, Radiotherapy Unit, Azienda Ospedaliera “Arcispedale Santa Maria Nuova”, IRCCS, Reggio Emilia, Italy
12. Radiation Oncology Department, University of Florence, Florence, Italy
13. Radiation Oncology Department, Centre Hospitalier Ibn Rochd, Casablanca, Morocco
14. Centre Privé d’oncologie—radiothérapie Elkholti Guelliz, Marrakech, Morocco
15. Department of oncology, Aalborg University Hospital, Denmark
16. Radiation Oncology, Ospedale Sacro Cuore-Don Calabria, Negrar, Verona, Italy