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  • Title: Complexed rheumatoid factor measurements in sera, synovial fluids and in immune complex fractions.
    Author: Falus A, Merétey K, Böhm U, Bozsóky S.
    Journal: Experientia; 1979 Mar 15; 35(3):413-4. PubMed ID: 36289.
    Abstract:
    Mild acidic treatment increases the rheumatoid factor titre of some sera and synovial fluids (SF) in rheumatoid arthritis (RA), juvenile RA (JRA) and most frequently in rheumatoid vasculitis. This unmasking of 'hidden' RF in serum and SF samples correlated with the RF-immune complexes (RF-IC) and complexed C4 present in the 3% polyethylene glycol (PEG) precipitates, indicating that by means of 'hidden' RF measurements RF-ICs are possibly detected. This method seems to provide a diagnostic tool for detecting RF-ICs in RA and other related diseases.
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