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Abstract We studied isotype-specific rheumatoid factors (RFs) to clarify their significance in rheumatoid arthritis (RA) and to verify the difference in RF isotypes between RA and chronic liver diseases (CLD). Isotype-specific RFs in RA and in CLD were measured by enzyme-linked immunosorbent assay (ELISA). Most sera (n = 51, 94.1%) from RA patients contained some kind of RF isotypes (92.1% for IgM...
Abstract To determine the predictive factors for rheumatoid arthritis (RA), 79 patients (11 men, 68 women; average age at onset of symptoms 37.1 years) with fixed joint effusion of one knee joint, of minimum 6 months duration, were divided into three groups: group I, 11 patients (14%) who progressed to RA; group II, 8 patients (10%) with the correct diagnosis, except that RA became apparent during...
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