Tang, Xue
Guo, Xia
Gao, Ju
Funding for this research was provided by:
Health and Family Planning Commission of Sichuan Province (18PJ042)
Article History
Received: 2 August 2019
Accepted: 23 December 2019
First Online: 14 January 2020
Compliance with Ethical Standards
:
: None.
: Scientific Research Project of Sichuan Provincial Health and Family Planning Commission (18PJ042).