title: Concept of pathological system in rheumatoid arthritis.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000150:complications / Q000473:pathology*; D002908:Chronic Disease; D006801:Humans; D008168:Lung / Q000473:pathology; D009206:Myocardium / Q000473:pathology; D009336:Necrosis