[1] St Jude Childrens Res Hosp, Dept Global Pediat Med, Memphis, TN USA
[2] Univ Colorado, Sch Med, Dept Pediat, Aurora, CO USA
[3] Univ N Carolina, Sch Med, Div Gen Med & Clin Epidemiol, Chapel Hill, NC USA
[4] St Damien Hosp, Dept Oncol, Port Au Prince, Haiti
[5] NCI, Dept Paediat Oncol, Maharagama, Sri Lanka
[6] Jimma Univ Med Ctr, Dept Pediat & Child Hlth, Jimma, Ethiopia
[7] Johns Hopkins Univ, Welch Med Lib, Baltimore, MD USA
[8] Univ Calif San Francisco, Dept Radiat Oncol, San Francisco, CA USA
[9] Univ Washington, Dept Hlth Metr Sci, Seattle, WA USA
[10] Univ Washington, Dept Pediat, Div Pediat Hematol Oncol, Seattle, WA USA
[11] Univ Toronto, Dept Radiat Oncol, Toronto, ON, Canada
[12] Princess Margaret Canc Ctr, Radiat Med Program, Toronto, ON, Canada
[13] Princess Margaret Canc Ctr, Canada Global Canc Program, Toronto, ON, Canada
[14] St Jude Childrens Res Hosp, Dept Oncol, Memphis, TN USA
[15] St Jude Childrens Res Hosp, Dept Global Pediat Med, 262 Danny Thomas Pl, Memphis, TN 39105 USA