Funding for this research was provided by:
Tianjin Science and Technology Project (15ZXLCSY00040)
National Major Science and Technology Projects of the 13th Five-Year Plan (2018ZX10732-202-004-005)
Text and Data Mining valid from 2020-04-16
Received: 26 November 2019
Accepted: 24 March 2020
First Online: 16 April 2020
Ethics approval and consent to participate
: There are no ethical issues involved in our study for our data were based on published studies.
: The manuscript is approved by all authors for publication.
: No conflicts of interest are declared by the authors.