Song et al. : cit-specific CD4+ T cells activated & expanded in CCP+ at-risk RA, CCP+ RA converters and early RA pts. Circulating Ag specific CD4+ T cells < RA converters vs. at-risk pts. Could this be due to migration in the joints? https://t.co/Vp0Rbwv6RB #0498 #ACR22 @Rheumnow https://t.co/NoN1ocjC70