The role of a so-called agglutination activating factor in the agglutination of hemolytic streptococci by rheumatoid arthritis sera.
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D000371:Agglutination; D001168:Arthritis; D001172:Arthritis, Rheumatoid; D006801:Humans; D013291:Streptococcus; D013297:Streptococcus pyogenes