IFNB1 and rheumatoid arthritis: In RA and in pSS groups, the frequency of pDC in blood samples strongly correlated with the stain intensity of IFN-β in the ducts (p = 0.022, r = 0.827), while mDC strongly correlated with the stain outspread of IFN-γ in the acini (p = 0.016, r = 0.748).