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Flow chart of patients inclusion and diagnosis.
Abbreviations: NSCLC, non-small cell lung cancer; TTE, transthoracic echocardiography; COPD, chronic obstructive pulmonary disease; ILD, interstitial lung disease; VHD, valvular heart diseases; CTD, connective tissue disease; PE, pulmonary embolism; PS, Zubrod performance status.
