TNFSF15 and sarcoidosis: In addition, AMs were marked by a decreasing expression of TL1A from patients with the active form of disease (15.2 % ± 3.6), to inactive sarcoidosis (7.3 % ± 3.5 of AMs; p < 0.01 vs active disease), to controls (4.8 % ± 2.1 of AMs; p < 0.01 vs active disease; ANOVA p < 0.01) (Fig. 1a).