Radboud University Nijmegen - Radboud University Medical Center, Radboud University Nijmegen - Radboud University Medical Center, University of Groningen - University Medical Center Groningen, Netherlands Cancer Institute, Dresden University of Technology - OncoRay Value Based Innovation, University of Groningen - Department of Radiation Oncology, Maastricht University, Princess Margaret Hospital, Maastricht University, Dresden University of Technology, Netherlands Cancer Institute, Netherlands Cancer Institute - Division of Medical Oncology and Radboud University Nijmegen - Radboud University Medical Center