#ACR23 Abstr#1512 Can we improve trial design of Bcell depletion in #SLE? Feasibility RCT of RTX in organ specific MSK showed: a) feasible to use ultrasound & clinical as endpoints, b) new tool LAMDA is responsive, c)potential worsening before later improvement with RTX @RheumNow https://t.co/YmbUOWVdWS