Oh, Tak Kyu
Park, Hye Youn
Song, In-Ae
Article History
Received: 4 September 2021
Accepted: 29 October 2021
First Online: 1 November 2021
Declarations
:
: The study protocol was approved by the Institutional Review Board (IRB) (X-2008-630-903), and the National Health Insurance Service (NHIS) permitted data sharing after approval of the study protocol (NHIS-2021-1-424). The requirement of informed consent was waived by the IRB because anonymized data was used in this study.
: Not applicable.
: The authors declare that they have no competing interests.