Park, Hyung Soon
Kim, Hyo Song
Beom, Seung Hoon
Rha, Sun Young
Chung, Hyun Cheol
Kim, Jee Hung
Chun, You Jin
Lee, Si Won
Choe, Eun-Ah
Heo, Su Jin
Noh, Sung Hoon
Hyung, Woo Jin
Cheong, Jae-Ho
Kim, Hyoung-Il
Son, Taeil
Lim, Joon Seok
Baek, Song-Ee
Jung, Minkyu
Funding for this research was provided by:
2014 faculty research grant from the Yonsei University College of Medicine (6-2014-0177 to M Jung)
Article History
Received: 7 January 2018
First Online: 26 July 2018
Conflict of interest
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The protocol was reviewed and approved by the local Institutional Review Board (IRB Approval No. 2017-2283-001).
: The institutional IRB decided to waive the informed consent of this study because it was an observation study using retrospectively collected data.