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Frequencies of cytokine-producing CD8+ T cells upon stimulation with varicella zoster virus (VZV) (A–C) and staphylococcal enterotoxin B (SEB, positive control) (D–F) in healthy control (HC) subjects (n = 23), giant cell arteritis (GCA) patients (n = 11) and polymyalgia rheumatica (PMR) patients (n = 15). Results are corrected for responses in non-stimulated cultures. Bars show the median. IFNγ, interferon-γ; TNFα, tumor necrosis factor α; IL-2, interleukin-2.
