ELISA results of BAFF secretion by salivary epithelial cells from minor salivary glands. Results are from eight patients with pSS and from eight controls. Supernatant of culture was harvested 48 hours after stimulation with IL-10 (100 ng/ml), IFN-α (2,400 U/ml), IFN-γ (5 ng/ml), tumor necrosis factor (TNF)-α (1 ng/ml) and IFN-γ (5 ng/ml) + TNF-α (1 ng/ml). Error bars indicate SEM. All samples were processed in duplicate. BAFF, B cell-activating factor.