Jo, In Ho
Lee, O-Sung
Lee, Seung Hoon
Kim, Kyung Wook
Lee, Yong Seuk
Article History
Received: 29 January 2018
Accepted: 23 May 2018
First Online: 26 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study protocol was approved by the institutional review board of our hospital (SNUBH, B-1409/266-104).
: For this type of study, formal informed consent was not required.