Be careful what you look for? Serum from 32 ACPA+ Pts and 30 ACPA neg all w #rheumatoidarthritis had multiplexed Ab- screening microarray w 1600+ antibodies. Novel Abs were identified in each group vs healthy controls. What does this mean? #ACR22 abst#0256 @RheumNow @ACRheum https://t.co/mqL8kuUkxY