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Patient presentation and clinical history
The patient is a 43-year-old male non-smoker who works as a farmer and cheese-maker. He complained of a dry cough for 6–12 months without fever or other clinical signs. His medical history was unremarkable with no use of drugs or alcohol and no signs of Raynaud’s syndrome. In his family history he had two first-degree relatives with pulmonary fibrosis, one of whom also had rheumatoid arthritis.