Funding for this research was provided by:
National Research Foundation of Korea
Arontier
Text and Data Mining valid from 2021-01-11
Version of Record valid from 2021-01-11
Article History
Received: 19 October 2020
Accepted: 22 December 2020
First Online: 11 January 2021
Competing interests
: The authors declare that they have no competing interests.