lung volumes , forced expiratory flow-volume curves , diffusing capacity indexes , and arterial blood gases were measured in 72 non-smoking patients with various connective tissue diseases ( 13 with rheumatoid arthritis , 17 with systemic lupus erythematosus , 25 with progressive systemic sclerosis , 10 with primary sjogren 's syndrome , 4 with polymyositis , and 3 with mixed connective tissue disease ) .
C0009782
connective tissue diseases
C0026272
mixed connective tissue disease