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BAL levels of IL6 (a) and CCL5 (b) are elevated in sarcoidosis patients. Cell-free bronchoalveolar fluid (BALF) was analyzed by Mesoscale Discovery in normal controls (N = 12), sarcoidosis subjects who underwent the microarray analysis of their BAL cells (sarcoidosis 1, N = 15) and a validation group of sarcoidosis patients that were not part of the original microarray study (sarcoidosis 2, N = 10). P-values were calculated using two-tailed Mann–Whitney test
