Funding for this research was provided by:
National Natural Science Foundation of China (81673259)
Natural Science Foundation of Jiangsu Province, China (BK20161435)
Program Sponsored for Practical Innovation Research of Graduate Student in Jiangsu Province ,China (SJCX18_0077)
Text and Data Mining valid from 2020-04-07
Received: 1 November 2019
Accepted: 26 February 2020
First Online: 7 April 2020
Ethics approval and consent to participate
: Not applicable.
: All the authors have consented for the publication.
: The authors declare that they have no competing interest.