Received: 22 March 2021
Accepted: 13 September 2021
First Online: 29 October 2021
: The study was approved by the Institutional Review Board of Jaseng Hospital of Korean Medicine in Seoul, South Korea (JASENG 2018–09-006). The Institutional Review Board of Jaseng Hospital of Korean Medicine in Seoul, South Korea has waived off the need for informed consent because encrypted and published data were used in this study. The principles expressed in the Declaration of Helsinki have been adhered to in the analysis.
: Not applicable.
: The authors declare that they have no competing interests.