Bae, Yoon-Jong
Shin, Sang-Jun
Kang, Hee-Taik
Article History
Received: 30 January 2022
Accepted: 4 May 2022
First Online: 11 May 2022
Declarations
:
: This study protocol was reviewed and approved by the Institutional Review Board (IRB) of Chungbuk National University Hospital, Cheongju, Chungbuk, South Korea. As this was a retrospective study using the Korean NHIS-HEALS cohort, the IRB of Chungbuk National University Hospital waived the requirement for informed consent in the consent to participate statement. This research complied with the 1964 Helsinki Declaration. We state to confirm that all methods were carried out in accordance with relevant guidelines and regulations.
: Not Applicable.
: The authors declare that they have no competing interests.