Rx failures w/ nonmedical switching of biosimilars may be Nocebo effect. 140 #RA pts, 51 non-switchers & 89 switchers. Non-switchers more likely to improve than switchers (68 vs 26%, p < 0.001) and less likely to worsen (1% vs 9%, p < 0.01). https://t.co/w8lnv1V5Pi https://t.co/iT2RkkSosl