
Keywords: DLco، ظرفیت انتشار ریه برای مونوکسید کربن; Rituximab; Rheumatoid arthritis; Pulmonary toxicity; Spirometry; Diffusion capacity; Lung injuryBAL, broncho-alveolar lavage; FVC, forced vital capacity; DLCO, diffusion capacity of the lung for carbon monoxide; NHL, non-Hodgkin's lymphoma; RA, rheumatoid