A#2546 Anti-IFX Ab in AS #ACR23 @RheumNow Anti-IFX in 45% in f/u, 85% in 1st yr MTX decr anti-IFX (18 v 42%) Anti-IFX - higher inflamm markers, infus rxn, lower serum levels and Rx fail Pt w/o anti-IFX Ab more likely to tolerate tapering https://t.co/eN9SqGyGgm