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Article History

Received: 9 May 2018

Accepted: 28 June 2018

First Online: 13 July 2018

Ethics approval and consent to participate

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Research Ethics Committee of the First affiliated hospital of Zhengzhou University. All subjects provided written informed consent. Animal studies were approved and conducted strictly in accordance with institutional ethical guidelines the Committee on the Use of Live Animals in Teaching and Research of Zhengzhou University.

: Not applicable.

: The authors declare that they have no competing interests.

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