IFNG and Behcet disease: Induction of IFN-γ and IL-13 production of short-term γδ T cell lines by TCR (BrHPP) re-stimulation did not differ among groups, whereas GM-CSF, TNF-α, CCL4 and CCL5 production was lower in BD compared to HC (P = 0.02, 0.015, 0.05, respectively).