Netherlands Cancer Institute - Department of Radiation Oncology, Maastricht University, Catharina Hospital - Department of Radiation Oncology, Institute Verbeeten - Department of Radiation Oncology, UZ Gasthuisberg - Department of Radiation Oncology, Ghent University Hospital - Department of Radiation Oncology, Amsterdam University Medical Centers - Department of Radiation Oncology, Erasmus MC Cancer Institute - Department of Radiation Oncology, Antwerp University Hospital - Pulmonology & Thoracic Oncology, University of Groningen - Department of Radiation Oncology, Netherlands Cancer Institute - Department of Radiation Oncology, Netherlands Cancer Institute - Division of Psychosocial Research and Epidemiology, KU Leuven - Leuven Cancer Institute, Netherlands Cancer Institute - Division of Psychosocial Research and Epidemiology, Netherlands Cancer Institute - Neurology, Netherlands Cancer Institute - Department of Biometrics, Netherlands Cancer Institute - Department of Biometrics and Netherlands Cancer Institute - Division of Psychosocial Research and Epidemiology

affiliation not provided to SSRN, affiliation not provided to SSRN, Vall d'Hebron Institute of Oncology (VHIO), affiliation not provided to SSRN, Universidade de Santiago de Compostela - Health Research Institute of Santiago de Compostela (IDIS), affiliation not provided to SSRN, University of Montpellier - Institut régional du Cancer de Montpellier, UZ Leuven, affiliation not provided to SSRN, Ghent University, German Cancer Research Center (DKFZ), Fondazione IRCCS Istituto Nazionale dei Tumori, University of Cambridge - Department of Oncology, affiliation not provided to SSRN, affiliation not provided to SSRN, CHU Nimes, Fondazione IRCCS Istituto Nazionale dei Tumori, affiliation not provided to SSRN, affiliation not provided to SSRN, UZ Gasthuisberg - Department of Radiation Oncology, affiliation not provided to SSRN, Ghent University, Fondazione IRCCS Istituto Nazionale dei Tumori, University of Leicester, affiliation not provided to SSRN, Maastricht University, affiliation not provided to SSRN, German Cancer Research Center (DKFZ), University of Heidelberg, University of Leicester, affiliation not provided to SSRN, affiliation not provided to SSRN, Ghent University, affiliation not provided to SSRN, University of Leicester, UZ Leuven, Polytechnic University of Milan, University of Leicester, The University of Manchester - Translational Radiobiology Group, affiliation not provided to SSRN and affiliation not provided to SSRN