[1] Brock Univ, Dept Child & Youth, St Catharines, ON L2S 3A1, Canada
[2] St Josephs Healthcare, Clin Preocupacao Saude Mulher, Hamilton, ON, Canada
[3] McMaster Univ, Programa Ciencias Med, Hamilton, ON, Canada
[4] Hosp Sick Children, Programa Risco Materno, Toronto, ON M5G 1X8, Canada