RAGAN, C The relationship of rheumatoid arthritis to periarteritis nodosa and systemic lupus erythematosus. [electronic resource] - Journal of chronic diseases Jun 1957 - 688-96 p. digital Publication Type: Journal Article ISSN: 0021-9681 Standard No.: 10.1016/0021-9681(57)90076-0 doi Subjects--Topical Terms: ArthritisArthritis, Rheumatoid--diagnosisDiagnosis, DifferentialHumansLupus Erythematosus, Systemic--diagnosisPolyarteritis Nodosa--diagnosis