Table 5 Chronic or deteriorating cough in patients with diffuse parenchymatous lung disease or autoimmune disease
1Due to the lung involvement itself (e.g. Sjögren’s syndrome, Wegener’s disease, systemic sclerosis, Churg–Strauss syndrome, idiopathic interstitial pneumonias and sarcoid)
2Due to the treatment (drug induced cough: methotrexate, cyclophosphamide)
3Due to infections in the immunocompromised host