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Effect of vitamin D in the hematopoietic cells. Vit D, vitamin D; +, activation; –, inhibition; MHC II, major histocompatibility complex class II; APCs, antigen presenting cells; Th2, T helper lymphocytes 2; IL, interleukin; Treg, regulatory T cells; TNF-α, tumor necrosis factor α; IFN-γ, interferon γ; CD8+ and CD4+, T lymphocytes CD8+ and CD4+, respectively.
