1 Department of Oncology, Monash Health and School of Clinical Sciences, Monash University, Melbourne, Australia. Electronic address: eva.segelov@monash.edu.
2 Department of Oncology, Oslo University Hospital, and Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
3 Department of Radiotherapy, Leeds Cancer Centre, University of Leeds, Leeds, United Kingdom.
4 Department of Gastrointestinal Oncology, Royal Marsden Hospital, London, United Kingdom.
5 Department of Hematology, Oncology and Radiation Physics, Skåne University Hospital, Lund, Sweden.
6 Department of Translational Medicine, University of Eastern Piedmont and Department of Radiation Oncology, Maggiore della Carità' University Hospital, Novara, Italy.
7 Department of Radiation Oncology, Institute Gustave Roussy, Villejuif, France.
8 Department of Medical Oncology, Asklepios Tumorzentrum Hamburg, AK Altona, Hamburg, Germany.
9 Department of Oncology, Aarhus University Hospital, Aarhus, Denmark.