Received: 19 March 2021
Accepted: 15 June 2021
First Online: 29 June 2021
: The Institutional Review Board of National Health Insurance Service Ilsan Hospital (NHIMC 2020–06-033) approved this Health Insurance Portability and Accountability Act-compliant retrospective study and waived the informed consent. All methods were performed in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare no conflicts of interest.