1. Faculty of Health Science, University of Malta. Msida, Malta;
2. Academisch Medisch Centrum Geneeskunde Amsterdam, Noord-Holland, The Netherlands;
3. Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands;
4. Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands;
5. German Cancer Research Center (Dkfz), Department of Radiology, Heidelberg, Germany;
6. Manchester Academic Health Centre, University of Manchester, The Christie NHS Foundation Trust, Manchester, UK