Liu, JiFeng http://orcid.org/0000-0002-7673-8461
Xiang, XiaoMei
Pu, ZhongShu
Long, Yong
Xiao, Dan
Zhang, WeiLu
Li, Qian
Li, XiTong
Li, SiYao
Shao, ZhongJun
Yang, XiaoLi
Xiong, YongMin
Funding for this research was provided by:
National Natural Science Foundation of China (81573104, 81773372, 30972517, 81373058)
Article History
Received: 15 March 2018
Accepted: 17 December 2018
First Online: 7 January 2019
Ethics approval and consent to participate
: The Ethics Committee of Fourth Military Medical University (Grant No.: 2015018) approved this study. The study has got the written consent to participate from the participants. Data analyzed in this study were previously gathered and had been de-identified. Data is got from Xi’an CDC disease surveillance system which is not public, and this study got the written permission of use these data from Xi’an CDC.
: Not Applicable.
: The authors declare that they have no competing interests.
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