Funding for this research was provided by:
Basic and Public Studies of Zhejiang Province (LGF18H180003)
Health and Family Planning Commission of Zhejiang Province, China (2018ZD043 and 2019KY665)
Text and Data Mining valid from 2020-03-04
Received: 9 September 2019
Accepted: 30 January 2020
First Online: 4 March 2020
Ethics approval and consent participate
: The study was conducted in accordance with the Committee for Human Research at our institution and followed all regulations. Informed consent was obtained before study.
: A consent to publication has been signed by each participant.
: The authors declare that they have no competing interests.