Article History
Received: 20 June 2018
Accepted: 20 September 2018
First Online: 27 September 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of the First Affiliated Hospital of Anhui Medical University on December 29, 2017(approval number:PJ2017-12-13) and written informed consents have been obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.
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