title: Seronegative rheumatoid arthritis and HLA-DR4: proposal for criteria.
authors.affiliation: Department of Rheumatology, University Hospital of Tromsø, Norway.
authors.forename: J T
authors.initials: JT
authors.lastname: Gran
authors.forename: G
authors.initials: G
authors.lastname: Husby
mesh_terms: D001172:Arthritis, Rheumatoid / Q000175:diagnosis* / Q000276:immunology; D006681:HLA-D Antigens / Q000032:analysis*; D006684:HLA-DR Antigens / Q000032:analysis*; D015804:HLA-DR4 Antigen; D006801:Humans; D012107:Research Design; D012217:Rheumatoid Factor / Q000032:analysis; D012698:Serologic Tests
chemical_list: D006681:HLA-D Antigens; D006684:HLA-DR Antigens; D015804:HLA-DR4 Antigen; D012217:Rheumatoid Factor