Zhu, Hongjun
Zhang, Shuanglin
Article History
Received: 14 October 2017
Accepted: 21 May 2018
First Online: 5 June 2018
Ethics approval and consent to participate
: This work did not require any written patient consent. The ethics committee of the First Affiliated Hospital of Henan University approved this work.
: The authors declare that they have no competing interests.
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