Pyo, Soonjae
Lee, Jae-Ik
Kim, Min-Ook
Lee, Hyung-Kew
Kim, Jongbaeg
Text and Data Mining valid from 2019-05-27
Version of Record valid from 2019-05-27
Article History
Received: 3 April 2019
Accepted: 23 May 2019
First Online: 27 May 2019
Competing interests
: The authors declare that they have no competing interests.