Ryu, Ik-Hee
Kim, Wook Kyum
Nam, Myoung Sik
Kim, Jin Kook
Kim, Sun Woong http://orcid.org/0000-0001-5305-4430
Article History
Received: 14 April 2020
Accepted: 14 July 2020
First Online: 18 July 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board (CR 319130) and was conducted according to the tenets of the Declaration of Helsinki. The institutional review board of Wonju Severance Christian Hospital waived the need for informed consent for this retrospective study.
: Not applicable (no identifying patient data).
: None of the authors have financial or proprietary interests (such as personal or professional relationships, affiliations, knowledge or beliefs) in any of the materials or methods mentioned in this study.