CD19 and rheumatoid arthritis: Consequently, the proportion of lymphocytes, including CD19+B cells (CD45+CD14−CD10−CD19+) and non-B (CD45+CD14−CD10−CD19−), designed as T/NK lymphocytes, was decreased (Figure 4B–D) and accounted (the median % of the cells) for 10.2% and 31.2% in the RA and OA groups, respectively, relative to 69.5% in the HC group.