Eosinophil-Derived Neurotoxin: A Potential Biomarker for Allergic Bronchopulmonary Aspergillosis.

Early research reported that sputum, plasma, or serum ECP levels tended to be higher in ABPA-positive patients than in those without ABPA, although the differences did not reach statistical significance. 24 , 25 We believe that discrepancies between previous findings and ours may be partly explained by differences in study populations.

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