Cheng, Sanuo
Zhang, Xingping
Xu, Yali
Dai, Xiaobo
Li, Jiachu
Zhang, Tao
Chen, Xiaopin
Funding for this research was provided by:
Health and Family Planning Commission of Chongqing, China
Natural Science Foundation of Chongqing (CSTC, 2010BB5395)
National Natural Science Foundation of China (81001096)
Article History
Received: 20 March 2018
Accepted: 3 October 2018
First Online: 27 November 2018
Competing Interests
: The authors declare no competing interests.