TBX21 and sarcoidosis: Among cytokines/cytokine receptors, the expression levels of IL2 (P < 0.001), IL2RB (P = 0.049), IL15RA (P = 0.048), and IFNG (P < 0.001) were elevated in sarcoidosis patients (Table 3, Figure 1(b)). T-bet mRNA expression was also found to be elevated in sarcoidosis patients (P = 0.006) comparing to control subjects (Table 3, Figure 1(b)).