Funding for this research was provided by:
National Health Insurance Service (2017-2-0015)
Article History
Received: 22 January 2021
Accepted: 20 July 2021
First Online: 28 July 2021
Declarations
:
: The study protocol was approved by the Institutional Review Board of Hallym University Sacred Heart Hospital (Approval number: 2018-07-007). The need for informed consent was waived on account of the retrospective nature of the National Health Information Database.
: Not applicable.
: The authors declare that they have no competing interests.