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Delineated cells of the innate and adaptive immune system. For each cell type, the cytokines that have been implicated in PTSD are indicated. IFNγ, interferon gamma; IL, interleukin; NK, natural killer; TGF-β, tumor growth factor beta; Th, T helper cell; TNF-α, tumor necrosis factor alpha; TNF-β, tumor necrosis factor beta; Treg, regulatory T cell.
