Funding for this research was provided by:
Overseas Research Collaboration of Hubei Province, China (2018AHB020)
Text and Data Mining valid from 2019-08-06
Received: 27 March 2019
Accepted: 28 June 2019
First Online: 6 August 2019
Ethics approval and consent to participate
: Not applicable. This is a literature data analysis.
: Not applicable
: The authors declare that they have no competing interests.