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Article History

Received: 28 June 2018

Accepted: 29 August 2018

First Online: 10 September 2018

Ethics approval and consent to participate

: This study was approved by the Ethics Committee of the First Affiliated Hospital of Harbin Medical University. All written informed consents were received from all patients.

: The authors agree for publication.

: The authors declare that they have no competing interests.

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