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Chronic obstructive pulmonary disease (COPD) is a common respiratory disease caused by air low limitation associate with a chronic in lammation [1]. According to the Global Initiative for Asthma statement, among patients with COPD, a sub-group of patients exhibit symptoms of a chronic airways disease that has features of both asthma and COPD, de ined as asthma and COPD overlap (ACO) [2]. A previous meta-analysis reported a 27% – 28% ACO prevalence rate in Abstract

archives of asthma, allergy and immunology

Short-term responses to high-dose inhaled corticosteroid treatment in patients with chronic obstructive pulmonary disease with a fractional nitric oxide concentration over 35 parts per billion: A single-centre pre–post study