TFRC and rheumatoid arthritis: No significant correlations were observed between Tfr-like, Tfh-like, and Tfh-like cell subsets and indicators of disease activity (ESR, CRP, DAS28), immunoglobulins (IgA, IgM, IgG), or typical antibodies of RA (anti-CCP, RF, AKA, APF) (Tables 1, 2).