Retrospective 170 RA pts Rx w/ IFX, ADA, & CZP shows CZP levels didnt differ w/ low or HI RF; but high basel RF linked to lower IFX & ADA drug levels, W/O DAS28 differences, but more IFX/ADA D/C w/ Hi baseline RF levels (80% vs. 75% vs. 33% CZP, p=0.002) https://t.co/OVUcKAgJ5a https://t.co/kzWd8jHXs3