Systematic review proves Keystones 60%/40%/20% response rule in biologic-naive #RA. 21 RCTs 1999-2017; For bio-naïve pts the ACR20/50/70 was 61.4%/37.8%/ 18.8%. For Bio-IR it was 48.5%/27.3%/12.9%- roughly 10pts lower. https://t.co/Xr3QEw278J https://t.co/OAfNghXlvB