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Scatter diagram illustrating the correlation between the percentage of peripheral blood (PB) CD8+CD28null T cells and carbon monoxide diffusing lung capacity (Dlco) in 17 sarcoidosis patients. Inlay presents the percentage of PB CD8+CD28null T cells between sarcoidosis patients without parenchymal involvement, radiographic stage I (n = 14) and with parenchymal involvement, radiographic stage II and higher (n = 9) at presentation.
