When the expression level of INFG was normalised to ACTB (2.42 ± 1.71; p = 0.053) or to GAPDH (1.95 ± 1.48; p = 0.09), the mRNA expression of INFG did not differ between control subjects and sarcoidosis patients (Fig. 5). This evidence concerns the gene GAPDH and sarcoidosis.