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Article History

Received: 21 September 2017

Accepted: 27 November 2018

First Online: 3 January 2019

Ethics approval and consent to participate

: No formal ethics approval was required in the study and informed written consent was waived by the Ethics Committee of Henan Provincial Center for Disease Control and Prevention, because the study is only about five clinical isolates of in-depth study, which does not involve in the human body, human specimens, or personal information.

: Not applicable.

: The authors declare that they have no competing interests.

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