Study setting & participants
All authors of the 2020 Japan College of Rheumatology Clinical Practice Guideline for the Management of Rheumatoid Arthritis (2020 JCR CPG) were considered for this study. The Japan College of Rheumatology (JCR) is the sole and most prestigious medical professional society in the field of rheumatology in Japan, boasting 9,860 society members as of March 2021 and established in 1957. CPGs published by the JCR wield significant influence in Japan.