1. Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong Hong Kong China
2. Shenzhen Research Institute, The Chinese University of Hong Kong Shenzhen China
3. BGI‐Shenzhen Shenzhen China
4. China National Genebank‐Shenzhen, BGI‐Shenzhen Shenzhen China
5. Bao'an Maternal and Child Health Hospital Shenzhen China
6. The Chinese University of Hong Kong‐Baylor College of Medicine Joint Center for Medical Genetics Hong Kong China