title: IgM rheumatoid factor and low molecular weight IgM. An association with vasculitis.
mesh_terms: D000328:Adult; D000368:Aged; D000936:Antigen-Antibody Complex; D001172:Arthritis, Rheumatoid / Q000097:blood / Q000209:etiology / Q000276:immunology*; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis*; D007249:Inflammation; D008297:Male; D008875:Middle Aged; D008970:Molecular Weight; D012217:Rheumatoid Factor / Q000032:analysis*; D014652:Vascular Diseases / Q000097:blood / Q000150:complications / Q000209:etiology / Q000276:immunology*
chemical_list: D000936:Antigen-Antibody Complex; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D012217:Rheumatoid Factor