Ethics approval and consent to participate
RECRUITMENT
The study protocol was approved by the institutional review board (IRB) of Jaseng hospital of Korean medicine at each institution before the participant recruitment process commenced (JASENG 2019-06-009, JASENG 2019-06-010, JASENG 2019-06-011, and JASENG 2019-06-008). Written informed consent was obtained from all patients. All methods were carried out in accordance with relevant guidelines and regulations.