1. Department of Pediatrics, Dongguan Eighth People’s Hospital, Dongguan, Guangdong Province, People’s Republic of China;
2. Department of Medical and Molecular Genetics, Dongguan Institute of Pediatrics, Dongguan, Guangdong Province, People’s Republic of China;
3. Department of Gynecology and Obstetrics, Dongguan Eighth People’s Hospital, Dongguan, Guangdong Province, People’s Republic of China