Liu, Na
Xu, Kai
Liu, Liquan
Chen, Xin
Zou, Yufan
Xiao, Xianjin https://orcid.org/0000-0003-0455-1080
Funding for this research was provided by:
National Natural Science Foundation of China (21705053)
Natural Science Foundation of Hubei Province (2017CFB117)
Hubei Province health and family planning scientific research project (J2017Q017)
Wuhan Youth Science and Technology Plan (2017050304010293)
Article History
Received: 15 May 2018
Accepted: 31 July 2018
First Online: 13 August 2018
Compliance with ethical standards
: The author(s) declare that they have no competing interests.