1 Joint Department of Medical Imaging (University Health Network, Sinai Health, Women's College Hospital), Toronto Canada; University of Toronto Department of Radiation Oncology, Toronto Canada. Electronic address: Caitlin.gillan@uhn.ca.
2 University of Toronto Department of Radiation Oncology, Toronto Canada; Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto Canada.
3 Nova Scotia Health Authority, Radiation Services, Halifax Canada; Department of Radiation Oncology, Dalhousie University, Halifax Canada.
4 McMaster University School of Interdisciplinary Science, Medical Radiation Sciences, Hamilton Canada.
5 Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto Canada.