1. Division of Human Genetics, School of Pathology, Faculty of Health SciencesUniversity of Witwatersrand and National Health Laboratory ServiceJohannesburg South Africa
2. Department of Obstetrics and Gynecology, Faculty of Health Sciences, Rahima Moosa Mother and Child HospitalUniversity of WitwatersrandJohannesburg South Africa
3. Department of Women's and Children's Health, Dunedin School of MedicineUniversity of OtagoDunedin New Zealand