1. Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University, Wenzhou, China
2. Laboratory of the Animal Center, Academy of Military Medical Sciences, Beijing, China
3. Department of Histology and Embryology, Shantou University Medical College, Shantou, China
4. Department of Medical Genetics, School of Basic Medical Sciences, Capital Medical University, Beijing, China
5. Department of Biomedical Science, Mercer University School of Medicine, Savannah, GA, USA