Dr O'Brien on co-existent AAV and RA. Not something I'm used to seeing, but maybe we need to think about it more? 25 cases with RA+AAV, 52 with RA + ANCA but no AAV, not sure what the denominator is here though. Abstr#0428 #ACR21 @RheumNow @profgayecunnane https://t.co/fN3BRpc7UJ