1. Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, People’s Republic of China;
2. Department of Gynecology and Obstetrics, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, People’s Republic of China;
3. AmCare Genomics Lab, Guangzhou, Guangdong Province, People’s Republic of China;
4. Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA