Kang, Kyoung-Tak
Koh, Yong-Gon
Lee, Jin-Ah
Lee, Jae Jung
Kwon, Sae Kwang
Article History
Received: 19 September 2019
Accepted: 13 February 2020
First Online: 21 February 2020
Ethics approval and consent to participate
: Approval was not required, as neither human participants nor animals were involved in this study.
: Not applicable
: The authors declare that they have no competing interests.