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Authors
Li, Hui-ying
Zhang, Yu-geng
Lei, Xia
Song, Jian
Duan, Zhao-jun https://orcid.org/0000-0003-3090-4150
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Funding
Funding for this research was provided by:
Key Technologies Research and Development Program (2016YFC1201904)
National Natural Science Foundation of China (81290345)
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Article History
Received: 19 March 2019
Accepted: 26 June 2019
First Online: 9 July 2019
Ethics approval and consent to participate
: Verbal consent was a common practice in epidemiological survey and we also only taken verbal consent from the parents by the pediatrics make sure the parents fully understands the benefit and the risk to participant in the study. Only we get the verbal consent of the parents, the whole process of study will be started. All study protocols and informed consent forms were approved by the Ethic Committee of the National Institute for Viral Disease Control and Prevention, Center for Disease Control and Prevention of China. All participants provided written informed consent to participate in the studies.
: Not applicable.
: The authors declare that they have no competing interests.
