a Analysis of the mRNA expression of the master transcription factor retinoic acid-related orphan receptor RORγt from CD4+ T cells isolated from the peripheral blood of healthy controls, (n=6) and sarcoidosis patients (n=10). b CBA analysis of IL-17A production from polyclonally activated CD4+ T cells isolated from the peripheral blood of healthy controls (diamonds, n=11) and patients with sarcoidosis (squares, n=28). c Representative plots of flow cytometric detection of intracellular IL-17A and surface expression of IL-23R on CD4+ T cells from polyclonally activated PBMC. d Frequencies of IL-17A+CD4+ and IL-23R+CD4+ from polyclonally activated PBMC of healthy controls (diamonds, n=11) and patients with sarcoidosis (square, n=25). P values are indicated