title: Antiperinuclear factors are present in polyarthritis before ACR criteria for rheumatoid arthritis are fulfilled.
authors.forename: A M
authors.initials: AM
authors.lastname: Boerbooms
mesh_terms: D000974:Antibodies, Antinuclear / Q000097:blood*; D001172:Arthritis, Rheumatoid / Q000097:blood* / Q000175:diagnosis; D015415:Biomarkers / Q000097:blood; D006801:Humans; D012698:Serologic Tests / Q000379:methods
chemical_list: D000974:Antibodies, Antinuclear; D015415:Biomarkers; C030902:antiperinuclear factor