Gu, Jia-qin
Guo, Yun-peng
Jiao, Zheng http://orcid.org/0000-0001-7999-7162
Ding, Jun-jie
Li, Guo-Fu http://orcid.org/0000-0002-4628-9941
Funding for this research was provided by:
National Natural Science Foundation of China (81573505)
Health and Family Planning Commission of Sichuan Province (2016ZB0301-01)
Article History
First Online: 2 December 2019
Compliance with Ethical Standards
:
: This work was supported by grants from the National Natural Science Foundation of China (No.81573505), and ‘Weak Discipline Construction Project’ (No. 2016ZB0301-01) of Shanghai Municipal Commission of Health and Family Planning. The funding organizations played no role in the preparation, review, or approval of the article.
: The authors have no conflicts of interest that are directly relevant to the contents of this review article.