(1)Amsterdam University Medical Centers VUmc location, Department of Radiation Oncology, Amsterdam, The Netherlands;

(1)Keimyung University Dongsan Medical Center, Radiation oncology, Daegu, Korea Republic of;(2)Samsung Medical Center, Radiation Oncology, Seoul, Korea Republic of;(3)Inha University Hospital, Radiation Oncology, Incheon, Korea Republic of;(4)School of Medicine- Kyungpook National University, Radiation Oncology, Daegu, Korea Republic of;(5)Yonsei University College of Medicine, Radiation Oncology, Seoul, Korea Republic of;(6)Seoul National University Bundang Hospital, Radiation Oncology, Seongnam, Korea Republic of;(7)Kyung Hee University Medical Center, Radiation Oncology, Seoul, Korea Republic of;(8)Yeungnam University College of Medicine, Radiation Oncology, Daegu, Korea Republic of;(9)College of Medicine- The Catholic University, Radiation Oncology, Seoul, Korea Republic of;(10)Soonchunhyang University College of Medicine, Radiation Oncology, Cheonan, Korea Republic of;

(1)Leiden University Medical Center, Radiation Oncology, Leiden, The Netherlands;(2)Barts Health NHS Trust, Clinical Oncology, London, United Kingdom;(3)Peter MacCallum Cancer Centre, Cancer Medicine, Melbourne, Australia;(4)Città della Salute and S Anna Hospital, Surgical Sciences, Torino, Italy;(5)University of Sherbrooke, Obstetrics and Gynaecology, Sherbrooke, Canada;(6)Institus Gustave Roussy, Radiotherapy, Villejuif, France;(7)Radboudumc, Medical Oncology, Nijmegen, The Netherlands;(8)UCL Cancer Institute, Cancer Research UK and UCL Cancer Trials Centre, London, United Kingdom;(9)Peter MacCallum Cancer Center, Radiation Oncology, Melbourne, Australia;(10)Azienda Ospedaliera della Provincia di Lecco, Radiotherapy, Lecco, Italy;(11)Princess Margaret Cancer Centre, Radiation Oncology, Toronto, Canada;(12)Centre Hospitalier Régional Universitaire de Besançon, Radiotherapy, Besançon, France;(13)University of Manchester, Institute of Cancer Sciences, Manchester, United Kingdom;(14)University Medical Center Groningen, Gynaecologic Oncology, Groningen, The Netherlands;(15)MAASTRO, Radiation Oncology, Maastricht, The Netherlands;(16)Auckland City Hospital, Radiation Oncology, Auckland, New Zealand;(17)University Medical Center Utrecht, Radiation Oncology, Utrecht, The Netherlands;(18)Comprehensive Cancer Center Netherlands, Central Data Management and Trial Coordination, Leiden, The Netherlands;(19)Leiden University Medical Center, Pathology, Leiden, The Netherlands;(20)Leiden University Medical Center, Medical Statistics, Leiden, The Netherlands;

(1)Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Radiation Oncology -, Mumbai, India;(2)Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Radiation Oncology, Mumbai, India;(3)Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Surgical Oncology, Mumbai, India;(4)Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute-, Radiation Oncology, Mumbai, India;(5)Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Medical Oncology, Mumbai, India;(6)Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Medical Onocology, Mumbai, India;(7)Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Otorhinolaryngology, Mumbai, India;

(1)University of Frankfurt, Department of Radiotherapy and Oncology, Frankfurt, Germany;(2)University Hospital Zürich, Department of Radiation Oncology, Zürich, Switzerland;(3)University of Frankfurt, Senckenberg Institute for Pathology, Frankfurt, Germany;

(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;