Liu, Siye
Wen, Lu
Hou, Jing
Nie, Shaolin
Zhou, Jumei
Cao, Fang
Lu, Qiang
Qin, Yuhui
Fu, Yi
Yu, Xiaoping
Funding for this research was provided by:
Health and Family Planning Commission of Hunan Province (B2016060, B2017099)
Article History
First Online: 27 April 2019
Compliance with ethical standards
:
: The authors do not have any possible conflicts of interest.