[1] Univ British Columbia, Div Radiat Oncol, BC Canc, Vancouver, BC, Canada
[2] BC Canc, Dept Radiat Oncol, Vancouver, BC, Canada
[3] Univ Toronto, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
[4] Univ Alberta, Dept Publ Hlth Sci, Surrey, AB, Canada
[5] St Jude Childrens Res Hosp, Epidemiol & Canc Control Dept, Memphis, TN USA
[6] Childrens Healthcare Atlanta, Aflac Canc & Blood Disorders Ctr, Atlanta, GA USA
[7] Univ Buffalo, Dept Pediat Oncol, Roswell Pk Canc Inst, Sch Med & Biomed Sci, Buffalo, NY USA
[8] Univ Buffalo, Oishei Childrens Hosp, Sch Med & Biomed Sci, Buffalo, NY USA
[9] City Hope Natl Med Ctr, Dept Hematol, Duarte, CA USA
[10] Univ Rochester, Med Oncol, Rochester, NY USA
[11] Vanderbilt Ingram Canc Ctr, Div Pediat Hematol Onc, Nashville, TN USA
[12] Childrens Hosp WI, Dept Pediat, Med Coll Wisconsin, Milwaukee, WI USA
[13] Hotel Dieu Quebec, Quebec City, PQ, Canada
[14] Princess Margaret Canc Ctr, Toronto, ON, Canada
[15] Yale Univ, Therapeut Radiol, Sch Med, New Haven, CT USA
[16] Univ Rochester, Wilmot Canc Inst, Dept Radiat Oncol, Rochester, NY USA
[17] Univ Hlth Network, Princess Margaret Canc Ctr, Dept Radiat Oncol, Toronto, ON, Canada