Back, Min Kyung
Moon, Hee Seok http://orcid.org/0000-0002-8806-2163
Kwon, In Sun
Park, Jae Ho
Kim, Ju Seok
Kang, Sun Hyung
Sung, Jae Kyu
Lee, Eaum Seok
Kim, Seok Hyun
Lee, Byung Seok
Jeong, Hyun Yong
Article History
Received: 17 July 2019
Accepted: 5 May 2020
First Online: 12 May 2020
Ethics approval and consent to participate
: This study conducted in accordance with the ethical standards of the declaration of Helsinki. The requirement for informed consent from the patients was waived because of the retrospective nature of this study, and this study protocol was approved by the institutional review board of Chungnam National University Hospital (CNUH 2019–03-073).
: Not applicable.
: The authors declare that they have no competing interests.