A study of the relation of seronegative and seropositive rheumatoid arthritis to each other and to necrotizing vasculitis.
D000328:Adult; D000974:Antibodies, Antinuclear / Q000032:analysis; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D003165:Complement System Proteins / Q000032:analysis; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis*; D007075:Immunoglobulin M / Q000032:analysis*; D007249:Inflammation; D007841:Latex Fixation Tests; D008297:Male; D009336:Necrosis; D014652:Vascular Diseases / Q000209:etiology / Q000276:immunology*; D005719:gamma-Globulins / Q000032:analysis*
D000974:Antibodies, Antinuclear; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D005719:gamma-Globulins; D003165:Complement System Proteins