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EasyRespiratoryChronic obstructive pulmonary diseaseau-amcau-racgp

A 50-year-old man presents with progressive exertional dyspnoea and chronic productive cough. He has a 40-pack-year smoking history. Spirometry shows FEV1/FVC ratio 0.55 and FEV1 60% predicted with limited reversibility. What is the most likely diagnosis?

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