Oh, Tak Kyu
Song, Kyung-Ho
Song, In-Ae
Article History
Received: 19 January 2021
Accepted: 29 June 2021
First Online: 11 July 2021
Declarations
:
: This study involved human participants, and all procedures were conducted in accordance with the guidance provided by the relevant ethics boards. The Institutional Review Board (IRB) of Seoul National University Bundang Hospital (IRB approval number: X-1911-579-902) and the Health Insurance Review and Assessment Service (NHIS-2020-2-067) approved the study protocol. Informed consent was waived by IRB of Seoul National University Bundang Hospital, because data analyses were performed retrospectively using anonymized health records derived from the South Korean NHIS database. Data were extracted by an independent medical record technician at the NHIS center who was unaffiliated with this study.
: Not applicable.
: The authors declare that they have no competing interests.