Affiliation: | 1. Department of Obstetrics and Gynecology, Tuen Mun Hospital, Hong Kong SAR;2. Clinical Genetic Service, Department of Health, Hong Kong SAR;3. Department of Obstetrics and Gynecology, Queen Mary Hospital, Hong Kong SAR;4. Department of Obstetrics 5. & Gynecology, Pamela Youde Nethersole Eastern Hospital, Hong Kong SAR;6. Department of Obstetrics and Gynecology, Prince of Wales Hospital, Hong Kong SAR;7. Department of Obstetrics and Gynecology, Queen Elizabeth Hospital, Hong Kong SAR;8. Department of Obstetrics and Gynecology, United Christian Hospital, Hong Kong SAR;9. Clinical Genetics Service, Hong Kong Sanatorium 10. & Hospital, Hong Kong SAR |