Leiden University, Medical Center (LUMC), Department of Pathology, University Hospital Zurich - Department of Pathology and Molecular Pathology, Leiden University, Medical Center (LUMC), Department of Pathology, Leiden University - Department of Vascular and Molecular Imaging, Leiden University, Medical Center (LUMC), Department of Pathology, Medisch Spectrum Twente - Department of Radiation Oncology, Laboratorium Pathologie Oost-Nederland (LabPON) - Department of Pathology, Laboratorium Pathologie Oost-Nederland (LabPON) - Department of Pathology, University Medical Center Utrecht - Department of Radiation Oncology, Maastricht University - Department of Radiation Oncology (MAASTRO), Erasmus University Medical Center Rotterdam - Department of Radiation Oncology, Radiotherapiegroep - Department of Radiation Oncology, Leiden University - Department of Radiation Oncology, Government of the United Kingdom - Department of Clinical Oncology, Barts Health NHS Trust, Department of Cellular Pathology, Peter MacCallum Cancer Centre - Department of Medical Oncology, University of Toronto - Department of Medical Oncology and Hematology, Université Paris XI Sud - Gustave Roussy Cancer Campus, University of Groningen - Department of Obstetrics and Gynecology, Leiden University, Medical Center (LUMC), Department of Pathology, Leiden University - Department of Radiation Oncology, Leiden University - Department of Radiation Oncology, University Hospital Zurich - Department of Pathology and Molecular Pathology and Leiden University, Medical Center (LUMC), Department of Pathology

affiliation not provided to SSRN, National and Kapodistrian University of Athens, Ospedale Santa Chiara - Azienda Ospedaliero Universitaria Pisana, affiliation not provided to SSRN, National and Kapodistrian University of Athens, Leiden University, Leiden University - Department of Vascular and Molecular Imaging, National and Kapodistrian University of Athens, University of Patras, University of Ioannina, National and Kapodistrian University of Athens, National and Kapodistrian University of Athens, affiliation not provided to SSRN, Imperial College London, Ospedale Santa Chiara - Azienda Ospedaliero Universitaria Pisana, affiliation not provided to SSRN, University of Ioannina, affiliation not provided to SSRN, Fondazione Toscana Gabriele Monasterio and affiliation not provided to SSRN