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Article History

Received: 19 May 2017

Accepted: 4 December 2017

First Online: 2 March 2018

Ethics approval and consent to participate

: The study was approved by the Committees for the Ethical Review of Research involving human subjects from Fuzhou General Hospital.

: All authors have reviewed the manuscript and approve it for publication. We claim that none of the materials in this article has been published or is under consideration for publication elsewhere.

: The authors declare that they have no competing interests.

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