[1] Hosp Sick Children, Ctr Global Child Hlth, Toronto, ON, Canada
[2] Boston Univ, Sch Publ Hlth, Boston, MA 02215 USA
[3] Harvard Med Sch, Dept Populat Med, Boston, MA 02115 USA
[4] Harvard Pilgrim Hlth Care Inst, Boston, MA 02115 USA
[5] Huazhong Univ Sci & Technol, Tongji Med Coll, Sch Publ Hlth, Dept Epidemiol & Biostat, Wuhan, Hubei, Peoples R China
[6] Chinese Acad Sci, Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Key Lab Syst Biol, Hangzhou, Zhejiang, Peoples R China
[7] Univ Hlth Network, Toronto Hlth Econ & Technol Assessment Collaborat, Toronto, ON, Canada
[8] Univ Toronto, Dept Hlth Policy Management & Evaluat, Toronto, ON, Canada
[9] Publ Hlth Ontario, Toronto, ON, Canada
[10] ICES, Toronto, ON, Canada
[11] McGill Univ, Dept Epidemiol Biostat & Occupat Hlth, Montreal, PQ, Canada