Jang, Min Sik
Kim, Bit Gyeol
Kim, Jihye
Article History
Received: 13 December 2020
Accepted: 10 May 2021
First Online: 18 May 2021
Declarations
:
: The study was designed and conducted using the format recommended by the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) guidelines. The study protocol was approved by the institutional review board of Kangdong Sacred Heart Hospital (reference number: 2020–11-007). The review board waived the requirement for informed consent for this study.
: Not applicable.
: The authors declare that they have no competing interests.