Kim, Seung Jae
Kwon, Oh Deog
Choi, Ho Chun
Lee, Eung-Joon
Cho, BeLong
Yoon, Dae Hyun
Article History
Received: 24 March 2021
Accepted: 24 August 2021
First Online: 10 September 2021
Declarations
:
: This study was conducted in accordance with the Declaration of Helsinki and was approved by the institutional review board (IRB) of Seoul National University Hospital (IRB No.E-15-5-079-673). The need to obtain informed consent was waived as the NHIS-NSC database is anonymized in accordance with strict confidentiality guidelines. This study also received approval from the National Health Insurance review committee (NHIS-2017-2-610).
: Not applicable.
: The authors declare that they have no competing interests.