Zhong, Xuemin
Wang, Jian
He, Lanying
Xu, Ronghua
Funding for this research was provided by:
Health and Family Planning Commission of Sichuan Province (2015009)
Article History
Received: 2 November 2019
Accepted: 5 October 2020
First Online: 12 October 2020
Ethics approval and consent to participate
: We obtained ethical approval for this study from the Medical and Health Research Ethics Committee in Second People’s Hospital of Chengdu. Written informed consent was obtained from all study participants.
: Not applicable.
: The authors declare they have no competing interests.