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Mean basement membrane thickness for asthma, COPD, and healthy controls of similar age. Reticular basement membrane thickness in central airway wall biopsies from 24 patients with asthma, 12 age-matched healthy controls of asthma, 17 patients with COPD and 10 age- and pack year-matched healthy controls of COPD.
Notes: Solid lines are means; *p < 0.05.
Abbreviation: COPD, chronic obstructive pulmonary disease.
