1. Department of Pediatrics, Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030012, China
2. Department of Reproductive Genetics, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi 046099, China
3. Department of Biochemistry, Basic Medicine College, Shanxi Medical University, Taiyuan, Shanxi 030607, China
4. Reproductive Medical Department, Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030012, China.