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Article History

Received: 13 August 2018

Accepted: 14 January 2019

First Online: 22 January 2019

Ethics approval and consent to participate

: Ethics approval for this study was obtained from the ethics review committee for human studies of Changzhou First People’s Hospital.This manuscript has been reviewed and approved by all the co-authors, and has not been submitted to any other journals for consideration for publication.

: The patients included in the study provided informed consent.

: The authors declare that they have no competing interests.

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