title: What about IgA rheumatoid factor in rheumatoid arthritis?
authors.forename: T
authors.initials: T
authors.lastname: Jónsson
authors.forename: H
authors.initials: H
authors.lastname: Valdimarsson
mesh_terms: D001172:Arthritis, Rheumatoid / Q000276:immunology*; D006801:Humans; D007070:Immunoglobulin A / Q000276:immunology*; D007075:Immunoglobulin M / Q000276:immunology*; D012217:Rheumatoid Factor / Q000276:immunology*
chemical_list: D007070:Immunoglobulin A; D007075:Immunoglobulin M; D012217:Rheumatoid Factor