[1] Univ Hlth Network, Radiat Med Program, Princess Margaret Canc Ctr, Toronto, ON, Canada
[2] Univ Hlth Network, Princess Margaret Canc Ctr, Toronto, ON, Canada
[3] Univ Toronto, Dept Radiat Oncol, Toronto, ON, Canada
[4] Univ Hlth Network, Dept Med Oncol & Hematol, Princess Margaret Canc Ctr, Toronto, ON, Canada
[5] Western Univ, London Reg Canc Program, London Hlth Sci Ctr, Dept Oncol, London, ON, Canada
[6] London Hlth Sci Ctr, London, ON, Canada
[7] Univ Hlth Network, Princess Margaret Res Inst, Toronto, ON, Canada
[8] Univ Hlth Network, Dept Biostat, Toronto, ON, Canada
[9] Princess Margaret Canc Ctr, Toronto, ON, Canada
[10] Univ Hlth Network, Joint Dept Med Imaging, Toronto, ON, Canada