Text and Data Mining valid from 2018-05-23
Received: 9 November 2017
Accepted: 9 May 2018
First Online: 23 May 2018
Ethics approval and consent to participate
: Ethics approval for this study was obtained from approved by the ethics committee of Xi’an Jiaotong University.
: The patients included in the study provided their informed consent.
: The authors declare that they have no competing interests.
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