Funding for this research was provided by:
Key Research and Development Project from the Department of Science and Technology of Sichuan Province (2017SZ0006)
Text and Data Mining valid from 2019-01-23
Received: 30 June 2018
Accepted: 2 January 2019
First Online: 23 January 2019
Ethics approval and consent to participate
: This study was approved by our institutional ethics committee——West China Hospital of Sichuan University Biomedical Research Ethics Committee.
: All authors gave their consent to publish the study.
: The authors declare that they have no competing interests.
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