Article History
Received: 21 May 2019
Accepted: 12 December 2019
First Online: 29 December 2019
Ethics approval and consent to participate
: Due to the retrospective nature of this study, which utilized data with encrypted personal information, it was granted an exemption in writing by the Institutional Review Board of Jaseng Hospital of Korean Medicine in Seoul, Korea (JASENG 2018–09-007). All authors read the Helsinki Declaration and followed the guidelines in this study.
: Not applicable.
: The authors declare that they have no competing interests.