Korean study of 1070 #RA pts. assessed for Dz activity & monthly pollution exposure (SO2, NO2, ozone, CO, PM10, PM2.5). Among 6 pollutants, PM2.5 signif incr risk of flare (adj OR 1.11) & DAS28-CRP, CDAI, TJC, SJC; more so w/ in women & nonsmokers & w/ prolonged PM2.5 exposure https://t.co/HgtWMz9LMs