Hyrich: ETN originator vs biosimilar initiation - DAS28 - no signif change at B/L, 6mo, 12 mo. Switch? Matched pts in ETN switch v cont originator - good b/l control on Rx -DAS28 maintained w switch 10% did go back to originator, felt less good tho similar DAS #ACR24 @RheumNow https://t.co/RHRit5CtUu