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A non-overlapping set (n = 51 was used for testing. CNN opacification scores were compared with Lund-MacKay (LM) visual scores, pulmonary function test results and other clinical variables using Spearman correlation and linear regression. RESULTS CNN scores were correlated with LM scores (rho = 0.82, p less then 0.001) and with forced expiratory volume in 1 second (FEV1) percentage predicted (rho = -0.21, p less then 0.001), FEV1 / forced vital capacity ratio (rho = -0.27, p less then 0.001), immunoglobulin E (rho = 0.20, p less then