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(A) PZP (pregnancy zone protein) concentrations in sputum in patients with bronchiectasis (n = 124) or chronic obstructive pulmonary disease (COPD) (n = 40). (B) Neutrophil extracellular traps measured using the histone–elastase complex assay in bronchiectasis and COPD. For both assays, comparisons are by Student’s t test.
