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Evaluation of IL-12 p40 as a marker of disease activity (compared to serum ACE and lysozyme levels) in sarcoidosis. (a) Correlation between serum IL-12 p40 and ACE. (b) Correlation between serum IL-12 p40 and lysozyme. (a) r = 0·484; P = 0·0008; n = 45. (b) r = 0·693; P = 0·0001; n = 45.
