1 Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G1L7, Canada; Department of Radiation Oncology, University of Toronto, Toronto, ON, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada. Electronic address: scott.bratman@uhnresearch.ca.
2 Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G1L7, Canada; Department of Radiation Oncology, University of Toronto, Toronto, ON, Canada.
3 Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G1L7, Canada; Department of Radiation Oncology, University of Toronto, Toronto, ON, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.
4 Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G1L7, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada; Department of Computer Science, University of Toronto, Toronto, ON, Canada; Ontario Institute of Cancer Research, Toronto, ON, Canada.