Yuan, Liming
Cao, Yiting
Luo, Qian
Yang, Wenyu
Wu, Xiaofeng
Yang, Xiaoping
Wu, Di
Tan, Siyuan
Qin, Ge
Zhou, Jia
Zeng, Yue
Chen, Xinghua
Tao, Xiaojun
Zhang, Qiufang
Funding for this research was provided by:
National Natural Science Foundation of China (No. 81303254, NO: 81641140)
Hubei Province health and family planning scientific research project (No. WJ2017M214)
Natural Science Foundation of Hunan Province (No. 2016JJ2088)
the Health and Family planning commission of Hunan Province research project (No.B2017073)
Article History
Received: 20 July 2018
Accepted: 24 September 2018
First Online: 10 October 2018
Competing Interests
: The authors declare that they have no competing interests.
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