[1] Mem Univ, Fac Med, Clin Epidemiol Unit, St John, NF, Canada
[2] Univ Ottawa, Sch Epidemiol Publ Hlth & Prevent Med, Ottawa, ON, Canada
[3] Childrens Hosp Eastern Ontario, Res Inst, Ottawa, ON, Canada
[4] Childrens Hosp Eastern Ontario, Newborn Screening Ontario, Ottawa, ON, Canada
[5] Mem Univ, Hlth Res Unit, Fac Med, St John, NF, Canada
[6] Ottawa Hosp Res Inst, Ottawa, ON, Canada
[7] Mem Univ, Fac Med, Commun Hlth & Humanities, St John, NF, Canada
[8] Univ Toronto, Inst Hlth Policy Management & Evaluat, Toronto, ON, Canada
[9] Hosp Sick Children, Res Inst, Program Child Hlth Evaluat Sci, Toronto, ON, Canada
[10] Eastern Hlth, Prov Med Genet Program, St John, NF, Canada
[11] Univ Ottawa, Dept Pediat, Fac Med, Ottawa, ON, Canada