¹Imaging and Radiation Oncology Core / MD Anderson Cancer Center, Radiation Physics, Houston, USA; ² Australian Clinical Dosimetry Service, Australian Radiation Protection and Nuclear Safety Agency; Olivia Newton-John Cancer Research and Wellness Centre, Radiation physics, Melbourne, Australia; ³NIHR Radiotherapy Trials Quality Assurance Group; University College London Hospital; University College London; National Physical Laboratory, Radiation Physics, London, United Kingdom; ⁴European Organisation for Research and Treatment of Cancer Radiotherapy Quality Assurance Group; University Hospital of Zurich, University of Zurich, Radiation Oncology, Zurich, Switzerland; ⁵International Atomic Energy Agency, Dosimetry and Medical Radiation Physics Section, Vienna, Austria; ⁶Radiation Dosimetry Services / MD Anderson Cancer Center, Radiation Physics, Houston, USA; ⁷National Physical Laboratory, Physics, Teddington, United Kingdom; ⁸Japan Clinical Oncology Group / Hokkaido University, Faculty of Health Sciences, Hokkaido, Japan; ⁹Japan Clinical Oncology Group / Tokyo Metropolitan Cancer and Infectious Disease Center Komagome Hospital, Radiation Oncology, Tokyo, Japan; ¹⁰Trans Tasman Radiation Oncology Group (TROG) / Peter MacCallum Cancer Centre, Radiation Oncology, Melbourne, Australia; ¹¹NIHR Radiotherapy Trials Quality Assurance Group / Mount Vernon Cancer Centre, Radiation Oncology, Northwood, United Kingdom; ¹²Imaging and Radiation Oncology Core / Washington University School of Medicine, Radiation Oncology, St. Louis, USA; ¹³European Organisation for Research and Treatment of Cancer (EORTC) / ASST GOM Niguarda Hospital, Medical Physics, Milan, Italy; ¹⁴European Organisation for Research and Treatment of Cancer / Jules Bordet Institute, Université Libre de Bruxelles, Medical physics, Brussels, Belgium; ¹⁵NIHR Radiotherapy Trials Quality Assurance Group / Mount Vernon Cancer Centre, Radiation oncology, Northwood, United Kingdom; ¹⁶Imaging and Radiation Oncology Core / University of Pennsylvania, Radiation Oncology, Philadelphia, USA; ¹⁷Trans Tasman Radiation Oncology Group (TROG) / Calvary Mater Newcastle, Radiation Oncology, Newcastle, Australia

(1)Tata Medical Center, Department of radiation Oncology, Kolkata, India;(2)Indian Institute of Technology, Department of Mechanical Engineering, Varanasi, India;(3)Indian Institute of Technology, School of Medical Science and Technology, Kharagpur, India;

(1)University of Trento, Physics, Trento, Italy;(2)Azienda Provinciale per i Servizi Sanitari APSS, Protontherapy Department, Trento, Italy;(3)Azienda Provinciale per i Servizi Sanitari APSS, Health Physics Department, Trento, Italy;(4)Istituto Nazionale di Fisica Nucleare INFN, Trento Institute for Fundamental Physics and Applications TIFPA, Trento, Italy;

(1)Medical University of Vienna, Department of Radiation Oncology- Comprehensive Cancer Center, Vienna, Austria;(2)Algemeen Ziekenhuis Turnhout, Department of Radiation Oncology, Turnhout, Belgium;(3)Aarhus University Hospital, Department of Oncology, Aarhus, Denmark;(4)Leiden University Medical Center, Department of Radiation Oncology, Leiden, The Netherlands;(5)University Medical Centre Utrecht, Department of Radiation Oncology, Utrecht, The Netherlands;(6)Gustave-Roussy, Department of Radiotherapy, Villejuif, France;(7)Tata Memorial Hospital, Department of Radiation Oncology, Mumbai, India;(8)Mount Vernon Hospital, Cancer Centre, London, United Kingdom;(9)Institute of Oncology, Department of Radiotherapy, Ljubljana, Slovenia;(10)The Norwegian Radium Hospital- Oslo University Hospital, Department of Oncology, Oslo, Norway;(11)Postgraduate Institute of Medical Education and Research, Department of Radiotherapy and Oncology, Chandigarh, India;(12)Cross Cancer Institute and University of Alberta, Department of Oncology, Edmonton, Canada;(13)Arnhem Radiotherapy Institute, Department of Radiotherapy, Arnhem, The Netherlands;(14)St James’s University Hospital, Leeds Cancer Centre, Leeds, United Kingdom;(15)University Hospitals Leuven, Department of Radiation Oncology, Leuven, Belgium;(16)St. Olavs Hospital, Clinic of Oncology and Women's Clinic, Trondheim, Norway;

(1)Comprehensive Cancer Center of Białystok, Department of Radiotherapy, Białystok, Poland;(2)Comprehensive Cancer Center- Medical University of Bialystok, Departament of Radiotherapy- Departament of Oncology, Bialystok, Poland;