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Letters to the editor
EBC pH and chronic cough
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We read with interest the recent article by Niimi et al reporting low levels of exhaled breath condensate (EBC) pH in patients with chronic cough.1 We and others have described low EBC pH in association with airway inflammation in allergic asthma, cystic fibrosis, and chronic obstructive pulmonary disease.2–4 In these studies there is a relatively close association between inflammation …