#Precision #Medicine in RA RCTs. Treat w right drug at right time? Possible problems -sample variation on synovial #bx, some won’t respond ex fibrotic phenotype variable drug distribution/resistance. AI is helping to separate Pts #ACR23 ⁦@ACRheum⁩ ⁦@RheumNow⁩ 13M140 https://t.co/D7NxpM4YNw