Funding for this research was provided by:
Fujian Province Science and Technology Innovation Joint Fund Project (2017Y9201)
Fujian Provincial Health and Family Planning Research Talents Training Project (2018-1-77)
Received: 6 September 2019
Accepted: 18 February 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
: Each patient gave written informed consent for their data to be used for research and publication.
: The authors declare that they have no competing interests.