Koh, Yong-Gon
Nam, Ji-Hoon
Chung, Hyun-Seok
Kim, Hyo-Jeong
Baek, Changhyun
Kang, Kyoung-Tak http://orcid.org/0000-0002-1036-193X
Article History
Received: 8 July 2019
Accepted: 21 October 2019
First Online: 2 November 2019
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: No funding has been received for this study.
: Ethical approval was obtained by the institutional review board at the Yonsei Sarang Hostpital.