[1] Western Univ, Dept Radiat Oncol, London, ON, Canada
[2] Dana Farber Canc Inst, Dept Radiat Oncol, Boston, MA USA
[3] Brigham & Womens Hosp, Boston, MA USA
[4] ICES, Toronto, ON, Canada
[5] Univ Toronto, Dept Radiat Oncol, Toronto, ON, Canada
[6] Univ Toronto, Div Thorac Surg, Toronto, ON, Canada
[7] McGill Univ, Dept Epidemiol Biostat & Occupat Hlth, Montreal, PQ, Canada
[8] Univ Toronto, Dept Med Oncol, Toronto, ON, Canada
[9] Univ Toronto, Dept Surg, Toronto, ON, Canada
[10] Univ Manitoba, Div Thorac Surg, Winnipeg, ON, Canada
[11] Queens Univ, Fac Hlth Sci, Kingston, ON, Canada
[12] Canadian Agcy Drugs & Technol Hlth, Ottawa, ON, Canada
[13] Genesis Care, Dept Radiat Oncol, Perth, Australia