Ryu, Gwanghui
Seo, Min Young
Lee, Kyung Eun
Kim, Hyo Yeol
Dhong, Hun-Jong
Chung, Seung-Kyu
Hong, Sang Duk http://orcid.org/0000-0003-3075-1035
Article History
Received: 7 January 2018
Accepted: 16 March 2018
First Online: 20 March 2018
Compliance with ethical standards
:
: The authors have declared that no competing interests exist.
: The Institutional Review Board of Samsung Medical Center approved this study, and the need for informed consent was waived (IRB No. 2015-07-056).