(1)BC Cancer Agency - Southern Interior, Radiation Oncology, Kelowna, Canada;(2)NRG Oncology, Statistics and Data Management Centre, Philadelphoa, USA;(3)Mayo Clinic, Radiation Oncology, Rochester, USA;(4)Thomas Jefferson University Hospital, Urology, Philadelphia, USA;(5)University of Tennessee Health Science Centre, Pathology, Memphis, USA;(6)John Muir Health Systems, Radiation Oncology, Walnut Creek, USA;(7)Sunnybrook Health Sciences Centre- Odette Cancer Centre, Radiation Oncology, Toronto, Canada;(8)Cross Cancer Institute, Radiation Oncology, Edmonton, Canada;(9)Centre Hospitalier Universitaire de Quebec, Radiation Oncology, Quebec, Canada;(10)Princess Margaret Cancer Centre- University Health Network, Radiation Oncology, Toronto, Canada;(11)Washington University School of Medicine, Radiation Oncology, St Louis, USA;(12)Helen Diller Family Comprehensive Cancer Center- University of California, Radiation Oncology, San Francisco, USA;(13)Cancer Centers of Northern Arizona, Radiation Oncology, Sedona, USA;(14)Valley View Hospital Cancer Centre- Emory University, Radiation Oncology, Atlanta, USA;(15)Fox Chase Cancer Center, Radiation Oncology, Philadelphia, USA;(16)Helen F Graham Cancer Center- Christiana Care, Radiation Oncology, Newark, USA;(17)Cedar Sinai, Radiation Oncology, Los Angeles, USA;

(1)Instituto Nacional de Enfermedades Neoplasicas, Department of Ophtalmic Oncology, Lima, Peru;(2)Instituto Nacional de Enfermedades Neoplasicas, Department of Radiotherapy, Lima, Peru;(3)University Medical Center Mannheim - University of Heidelberg - Medical Faculty Mannheim, Department of Radiation Oncology, Mannheim, Germany;

(1)McGill University, Oncology, Montreal, Canada;

¹Franciszek Lukaszczyk Memorial Oncology Center, Neurooncology and Radiosurgery, Bydgoszcz, Poland; ²Franciszek Lukaszczyk Memorial Oncology Center, Radiotherapy, Bydgoszcz, Poland; ³Franciszek Lukaszczyk Memoriał Oncology Center, Medical Physics, Bydgoszcz, Poland; ⁴Franciszek Lukaszczyk Memorial Oncology Center, Nuclear Medicine, Bydgoszcz, Poland

(1)The University of Texas MD Anderson Cancer Center, Radiation Physics, Houston, USA;(2)The University of Texas MD Anderson Cancer Center, Biostatistics, Houston, USA;

(1)Centro di Protonterapia, Protontherapy, Trento, Italy;

¹Clínica Universidad de Navarra, Oncology, Pamplona, Spain

¹MHAT Uni Hospital, Clinic of Radiotherapy, Panagyuriste, Bulgaria; ²SHAT of Oncology, Clinic of Radiotherapy, Sofia, Bulgaria; ³UMHAT St.Marina, Clinic of Medical Oncology, Varna, Bulgaria; ⁴MHAT Nadezhda, Clinic of Medical Oncology, Sofia, Bulgaria

¹Institute Cancer Research/Royal Marsden Hospital, Radiation and Imaging, Sutton, United Kingdom; ²Guys and St Thomas NHS Trust, Clinical Oncology, London, United Kingdom; ³Institute Cancer Research/Royal Marsden Hospital, Joint Department of Physics, Sutton, United Kingdom; ⁴Institute of Cancer Research/Royal Marsden Hospital , Joint Department of Physics, Sutton, United Kingdom; ⁵Institute Cancer Research/Royal Marsden Hospital, Radiotherapy, Sutton, United Kingdom; ⁶Royal Marsden Hospital, Radiotherapy , Sutton, United Kingdom; ⁷Royal Marsden Hospital, Radiotherapy, Sutton, United Kingdom

(1)University Hospital La Princesa, Medical Physics, Madrid, Spain;