1 Department of Radiation Oncology, Netherlands Cancer Institute, Amsterdam, the Netherlands; Department of Radiation Oncology, Leiden University Medical Center, the Netherlands.
2 Department of Radiotherapy and Oncology, University of Frankfurt, Germany.
3 Department of Radiotherapy, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland.
4 Department of Radiation Oncology, University Hospitals Leuven, Belgium.
5 Department of Radiotherapy, Mount Vernon Centre for Cancer Treatment, Northwood, London, United Kingdom.
6 Department of Radiology, Radiation Oncology and Hematology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica S. Cuore, Rome, Italy.
7 Department of Oncology, Aarhus University Hospital, Denmark.
8 Department of Oncology, Oslo University Hospital, Norway.
9 Department of Oncology, Sorbonne University, Paris, France.
10 Department of Radiotherapy, Universidad de Navarra, Madrid, Spain.
11 Department of Radiotherapy, Champalimaud Foundation, Lisbon, Portugal.
12 Department of Immunology, Genetics and Pathology, Uppsala University, Sweden.
13 Department of Radiotherapy, Leeds Cancer Centre, University of Leeds, UK.