Wang, Haiwei
Wang, Xinrui
Xu, Liangpu
Zhang, Ji
Cao, Hua
Funding for this research was provided by:
Fujian Provincial Maternity and Children's Hospital (YCXB 18-10 and YCXM 19-04)
Article History
Received: 28 January 2019
Accepted: 6 June 2019
First Online: 20 June 2019
Ethics approval and consent to participate
: None of the materials are required ethical approval for their use.
: Not applicable.
: The authors declare that they have no competing interests.