1. Department of Clinical Laboratory, Zhangqiu District People’s Hospital, Jinan 250200, China
2. Department of Obstetrics and Gynecology, Qingdao Hospital of Traditional Chinese Medicine, Qingdao Hiser Hospital, Qingdao 266033, China
3. Department of Obstetrics and Gynecology Clinic, Jiyang People’s Hospital, Jinan 251400, China
4. Department of Obstetrics and Gynecology, Zhangqiu District People’s Hospital, Jinan 250200, China
5. Department of Clinical Laboratory, Jining Maternal and Child Health and Family Planning Service Center, Jining 272100, China