Article History
Received: 24 July 2021
Revised: 21 March 2022
Accepted: 25 March 2022
First Online: 20 April 2022
Competing interests
: The authors declare no competing interests.
: This study was approved by the Institutional Review Board of the National Health Insurance Service Ilsan Hospital (NHIMC 2020-11-016). Informed consent was waived by the board because anonymous raw data were obtained from the National Health Insurance Service of Korea. The study was done in accordance with the Declaration of Helsinki.