There was a nearly significant positive correlation between the levels of serum MMP-2 and the severity of the cystic lung involvement by CT: median MMP-2 was 458 (305–536) ng/ml in the mild disease group, 500 (348–783) ng/ml in the moderate disease group, and 551 (456–782) ng/ml in the severe disease group ( p = 0.087).
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