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. 2019 Jun 10;16(7):967–980. doi: 10.7150/ijms.32752

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Diagnostic work-up of chronic respiratory failure in interstitial lung diseases. Footnotes: 6MWT: six minute walking test; CPFE: combined pulmonary fibrosis and emphysema; CRF: chronic respiratory failure; CT: computed tomography; DLCO: diffusing lung capacity for carbon monoxide; FVC: forced vital capacity; HF: heart failure; HRCT: high resolution computed tomography; ILD: interstitial lung disease; NT-proBNP: N-terminal pro B-type natriuretic peptide; OSAS: obstructive sleep apnea syndrome; PE: pulmonary embolism; PFTs : pulmonary function tests; PH: pulmonary hypertension; RHC: right heart catheterization.