Ju, Jingjuan
Jiang, Yu
Zhou, Peng
Li, Lin
Ye, Xiaolei
Wu, Hongmei
Shen, Bin
Zhang, Jialei
He, Xiaoding
Niu, Chunjin
Xia, Qinghua
Article History
Received: 25 March 2017
Accepted: 1 May 2018
First Online: 10 May 2018
Ethics approval and consent to participate
: The project was approved by Institutional Review Board (IRB) of Changning Center for Disease Control and Prevention, written informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no competing interests.
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