Received: 12 August 2021
Accepted: 18 November 2021
First Online: 4 December 2021
: The study protocol was reviewed and approved by the Institutional Review Board (IRB) of Inje University Seoul Paik Hospital (IRB no. PAIK- 2021-08-003). IRB waived the requirements of informed consent as all data were anonymous. Therefore, this study was performed without prior informed consent.
: Not applicable.
: The authors declare that they have no competing interests.