Dr Jin @SeoyoungCKim population-based study on predictors of switching after 1st line TNFi use. 22% switch, most to 2nd TNFi.👩, prior steroid use predicted change, other autoimmune disease and vit D use negative predictors. Abstr#579 #ACR21 @RheumNow https://t.co/YpZ5rGBiod