Funding for this research was provided by:
National Natural Science Foundation of China (81170042;81370121)
The Research Fund for the Doctoral Program of Higher Education of China (20130181110068)
The National Scientific and Technological Major Project of China (2012ZX10004-901)
Text and Data Mining valid from 2018-11-13
Received: 10 May 2018
Accepted: 31 October 2018
First Online: 13 November 2018
Ethics approval and consent to participate
: All protocols were approved by the ethics committee of the West China Hospital of Sichuan University. Written informed consent was obtained from all participants or their legal guardians.
: Not applicable.
: The authors declare that they have no competing interests.
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