1. Department of Obstetrics, Lianyungang Maternal and Child Health Hospital, Lianyungang, Jiangsu, China
2. Department of Genetics and Prenatal Diagnosis, Lianyungang Maternal and Child Health Hospital, Lianyungang, Jiangsu, China
3. Department of Pediatrics, Lianyungang Affiliated Hospital Nanjing University of Traditional Chinese Medicine, Lianyungang, Jiangsu, China