title: 19S IgM rheumatoid factor plaque forming cells in a five-year-old patient with juvenile rheumatoid arthritis.
mesh_terms: D000921:Antibody-Producing Cells / Q000276:immunology*; D001171:Arthritis, Juvenile / Q000276:immunology*; D002675:Child, Preschool; D005260:Female; D006462:Hemolytic Plaque Technique; D006801:Humans; D007075:Immunoglobulin M / Q000276:immunology; D012217:Rheumatoid Factor / Q000276:immunology*
chemical_list: D007075:Immunoglobulin M; D012217:Rheumatoid Factor