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Increase in HLA-DR+ T cells in BALF in DM/PM patients with corticosteroid-resistant and corticosteroid-sensitive IP. BALF cells from DM/PM patients with corticosteroid-resistant IP (n = 6) and corticosteroid-sensitive IP (n = 16) and from controls without IP (n = 12) were stained with (a) anti-CD4-FITC and (b) anti-CD8-PerCP, and anti-HLA-DR-PE antibodies and analysed by FACS. • DM patients, ▪ PM patients, ▴ lung cancer patients without IP. *P < 0·001.
