[1] Univ Toronto, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
[2] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada
[3] Populat Hlth Res Inst, Hamilton, ON, Canada
[4] McMaster Univ, Dept Pediat, Hamilton, ON, Canada
[5] McMaster Univ, Dept Med, Hamilton, ON, Canada
[6] York Univ, Sch Kinesiol & Hlth Sci, Toronto, ON, Canada