Funding for this research was provided by:
Scientific Fund of the Application Fundamental Project (2016-JY-0118)
Key Project of Research and Development Program (18ZDYF1175)
Text and Data Mining valid from 2019-07-08
Received: 18 March 2019
Revised: 26 May 2019
Accepted: 11 June 2019
First Online: 8 July 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals by any of the authors.