1. Zhuanji Fang:
Department of Obstetrics,Fujian Maternity and Child Health Hospital,Affiliated Hospital of Fujian Medical University;No. 18, Daoshan Road,Fuzhou, Fujian Province, P.R. China
2. Huale Zhang:
Department of Obstetrics, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University;,No. 18, Daoshan Road, Fuzhou, Fujian Province,P.R. China
3. Shuisen Zheng:
Department of Obstetrics, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University;,No. 18, Daoshan Road, Fuzhou, 350000, Fujian Province,P.R. China
4. Lingling Weng:
Department of Obstetrics, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University;,No. 18, Daoshan Road, Fuzhou, 350000, Fujian Province,P.R. China
5. Jianying Yan:
Department of Obstetrics, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University;,No. 18, Daoshan Road, Fuzhou, 350000, Fujian Province,P.R. China