(1)Hôpital de La Tour, Radiotherapy, Meyrin, Switzerland;

¹IEO European Institute of Oncology IRCCS, Division of Radiation Oncology, Milan, Italy; ²University of Milan, Department of Oncology and Hemato-Oncology, Milan, Italy; ³Istituto Nazionale Tumori IRCCS Fondazione G. Pascale, Vision of Radiation Oncology, Napoli, Italy; ⁴Centro Nazionale di Adroterapia Oncologica, Clinical Radiotherapy Unit, Pavia, Italy; ⁵Centro Nazionale di Adroterapia Oncologica, Medical Physics Unit, Pavia, Italy; ⁶University of Turin, Department of Radiation Oncology, Torino, Italy; ⁷University of Piemonte Orientale, Department of Translation Medicine, Radiotherapy Unit, Novara, Italy; ⁸MedAustron Center for Ion Therapy and Research, Medical Department, Wiener, Austria; ⁹Centro Nazionale di Adroterapia Oncologica, Clinical Department-Bioengineering Unit, Pavia, Italy; ¹⁰IEO European Institute of Oncology IRCCS, Epidemiology and Biostatistics Unit, Milan, Italy; ¹¹IEO European Institute of Oncology IRCCS, Unit of Medical Physics, Milan, Italy; ¹²IEO European Institute of Oncology IRCCS, Division of Head and Neck Surgery, Milan, Italy; ¹³IEO European Institute of Oncology IRCCS, Division of Urogenital and Head and Neck Tumors, Milan, Italy; ¹⁴IEO European Institute of Oncology IRCCS, Scientific Directorate, Milan, Italy

(1)Salah Azaiz Institute, Radiation Oncology, Tunis, Tunisia;

(1)Queen's University Belfast, Centre for Cancer Research and Cell Biology, Belfast, United Kingdom;(2)National Physical Laboratory, Radiation Biology, London, United Kingdom;(3)Belfast Health and Social Care Trust, Radiotherapy Physics, Belfast, United Kingdom;

(1)Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Radiotherapy Department, Gliwice, Poland;

(1)University Hospital Zürich, Radiation Oncology, Zurich, Switzerland;(2)Peter MacCallum Cancer Centre, Radiation Oncology, Melbourne, Australia;(3)University Hospital Augsburg, Radiation Oncology, Augsburg, Germany;(4)University Hospital Ghent, Radiation Oncology, Ghent, Belgium;(5)University Medical Center Schleswig-Holstein, Radiation Oncology, Kiel, Germany;(6)Charité-University Hospital Berlin, Radiation Oncology, Berlin, Germany;(7)University Medical Center Freiburg, Radiation Oncology, Freiburg, Germany;(8)University Medical Center Utrecht, Radiation Oncology, Utrecht, The Netherlands;(9)Schwarzwald-Baar Klinikum, Radiation Oncology, Villingen-Schwenningen, Germany;(10)University Hospital Munich, Radiation Oncology, Munich, Germany;(11)Ordensklinikum Linz, Radiation Oncology, Linz, Austria;(12)University Hospital Tübingen, Radiation Oncology, Tübingen, Germany;

(1)Royal Brisbane and Women's Hospital, Radiation Oncology- Cancer care Services, Herston, Australia;

(1)Medical University of Vienna / Vienna General Hospital, Department of Radiation Oncology, Vienna, Austria;(2)Umeå University, Department of Radiation Sciences, Umeå, Sweden;

(1)Institute of Nuclear Physics, Pan, Krakow, Poland;(2)University of Rome, Sapienza, Rome, Italy;(3)University of Lyon/CNRS CREATIS UMR5220- Centre Léon Bérard, Creatis UMR5220, Lyon, France;(4)Maastricht Radiation Oncology MAASTRO clinic, Radiation Oncology, Maastricht, The Netherlands;