[1] Windsor Reg Hosp, Div Neonatol, 1995 Lens Ave, Windsor, ON N8W 1L9, Canada
[2] Western Univ, Dept Pediat, Schulich Med & Dent, London, ON, Canada
[3] Ottawa Hosp Res Inst, Ottawa, ON, Canada
[4] ICF Canada, Ottawa, ON, Canada
[5] Childrens Hosp Eastern Ontario, Dept Neonatol, Ottawa, ON, Canada
[6] Univ Ottawa, Fac Med, Sch Epidemiol Publ Hlth & Prevent Med, Ottawa, ON, Canada
[7] Univ Ottawa, Childrens Hosp Eastern Ontario, Dept Pediat, Res Inst, Ottawa, ON, Canada