1 Radiation Oncology Department, Ghent University Hospital and Ghent University, Belgium.
2 Princess Margaret Cancer Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada.
3 Department of Radiation Oncology, University of Pennsylvania, Philadelphia, USA; Department of Oncology, Princess Marina Hospital, Gaborone, Botswana.
4 Department of Radiation Oncology, Dana Farber/Brigham and Women's Cancer Center, Boston, USA; Department of Health Policy and Management, Harvard T.H. Chan School of Public Health, Boston, USA.
5 Union for International Cancer Control (UICC), Geneva, Switzerland.
6 Ingham Institute, University of New South Wales, Liverpool, Australia; Macarthur Cancer Therapy Centres, University of Western Sydney, Campbelltown, Australia.
7 International Atomic Energy Agency, Vienna, Austria.