[1] Univ British Columbia, Dept Med, Div Endocrinol, Vancouver, BC, Canada
[2] Univ British Columbia, Dept Pediat, Div Endocrinol & Diabet, Vancouver, BC, Canada
[3] Abbotsford Reg Hosp, Abbotsford, BC, Canada
[4] Univ British Columbia, Dept Obstet & Gynecol, Vancouver, BC, Canada
[5] BC Childrens Hosp, Res Inst, Vancouver, BC, Canada