Choi, Juwhan
Sim, Jae Kyeom
Oh, Jee Youn
Lee, Young Seok
Hur, Gyu Young
Lee, Sung Yong
Shim, Jae Jeong
Rhee, Chin Kook
Min, Kyung Hoon
Article History
Received: 26 January 2021
Accepted: 28 April 2021
First Online: 6 May 2021
Declarations
:
: This study was conducted in accordance with the 'Declaration of Helsinki' as a statement of ethical principles for medical research involving human subjects, including the study of identifiable human substances and data. This study was approved by the Institutional Review Board of Korea University Guro Hospital (KUGH16131-002) for all research-related matters prior to the start of the study and was conducted in compliance with the relevant research regulations throughout the study. This study is a study through retrospective data analysis, and since there is no reason to estimate the subject's refusal to consent and the risk to the subject is low even without consent, it was approved as a 'signature consent waiver study' by the institutional review committee. In the course of the research, all personally identifiable data were anonymized to further minimize the impact on the research subject.
: Not applicable.
: There is no competing interest. All authors declare they have no competing interest.