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Percentages of CD3+PD-1+ T-cells inversely correlate with SLE Disease Activity Index. Peripheral T-cells were collected from 15 patients with SLE and the percentages of cells expressing CD3 and PD-1 were calculated by flow cytometry. SLE disease activity was calculated using SLEDAI QxMD and linear regression was analyzed using Prism. r 2 = 0.487 and p = 0.004.
