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Negative correlations among IL-4/total protein in BALF and FVC, FEV1 and DLco in chronic EAA patients. BALF, bronchoalveolar lavage fluid; DLco lung diffusing capacity for carbon monoxide; EAA, extrinsic allergic alveolitis; e.v., expected values; FEV1, forced expired volume in 1 second; FVC, forced vital capacity; HRCT, high resolution computed tomography; IL-4R, interleukin 4 receptor (pg/ml). FVC, FEV1, DLco expressed in % of expected value.
