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Patient presentation and follow-up
The patient was a 54-year-old man who presented with mild dyspnoea, a persistent cough and “velcro” crackles. He worked as a carpenter and smoked (10 pack–years) until 14 years ago. He had arterial hypertension and suffered a deep vein thrombosis 2 years ago. His lung function was impaired with an FVC of 70% and DLCO of 43%.