Affiliation: | 1. Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China;2. Clinical Genetic Service, Department of Health, Hong Kong, SAR, China;3. Department of Obstetrics & Gynaecology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China;4. Department of Human Genetics, McGill University, Montreal, Canada |