Funding for this research was provided by:
National Natural Science Foundation of China (81270435)
Text and Data Mining valid from 2018-07-20
Received: 9 August 2017
Accepted: 20 June 2018
First Online: 20 July 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Second Affiliated Hospital of Xi’an Jiaotong University.
: Not applicable.
: The authors declare that they have no competing interests.
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