Funding for this research was provided by:
National Natural Science Foundation of China (81460169)
Text and Data Mining valid from 2019-04-09
Received: 23 November 2018
Accepted: 26 March 2019
First Online: 9 April 2019
Ethics approval and consent to participate
: The research design was approved by the Ethics Committee. The First Affiliated Hospital of Guangxi Medical University (No: Lunshen-2011-KY-Guoji-001; March 7, 2011). All procedures are conducted in conformity to ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.
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