Funding for this research was provided by:
Guangxi self-financing research projects (Z20190025)
Text and Data Mining valid from 2019-11-18
Received: 14 August 2019
Accepted: 27 October 2019
First Online: 18 November 2019
Ethics approval and consent to participate
: The research design was approved by the Ethics Committee. The Liuzhou People’s Hospital (No: Lunshen-2017-KY; Mar. 7, 2017). All procedures are conducted in conformity to ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.