Affiliation: | 1. Department of Obstetrics & Gynaecology, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China;2. Department of Prenatal Diagnosis and Counselling, The University of Hong Kong, Tsan Yuk Hospital, Hong Kong SAR, China;3. Department of Pathology, The University of Hong Kong, Queen Mary Hospital Hong Kong SAR, China;4. Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China |