Funding for this research was provided by:
Fujian Provincial Health and Family Planning Research Talents Training Project (No. 2018-2-67)
Xiamen Municipal Health and Family Planning Commission (No. 2018-2-67)
Article History
Received: 9 January 2020
Accepted: 25 May 2020
First Online: 15 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All applicable international, national, and/or institutional guidelines of ethical approval were followed.