Reader beware: Interpretation of relative effectiveness & safety of JAKi vs bDMARDs in real world data POS0093 JAK-pot heterogeneity between countries with variable safety @RheumNow @eular_org #EULAR2021 19 registries >700 JAK RA Rx markedly diff d/c due to AEs https://t.co/jFgN8NVx8v