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Article History

Received: 2 May 2018

Accepted: 13 December 2018

First Online: 22 December 2018

Ethics approval and consent to participate

: The study protocols were approved by the Ethical Committee of the Taizhou Central Hospital.

: Written informed consent was obtained from the participants for publication of this article and any accompanying tables/images. A copy of the written consent is available for review by the Editor of this journal.

: The authors declare that they have no competing interests.

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