title: IgM and IgA rheumatoid factors detected by ELISA in seronegative rheumatoid arthritis patients.
authors.affiliation: Department of Rheumatology, Rambam Medical Center, Technion-Israel Institute of Technology, Haifa.
authors.forename: R
authors.initials: R
authors.lastname: Brik
authors.forename: M
authors.initials: M
authors.lastname: Lorber
authors.forename: M
authors.initials: M
authors.lastname: Rivkin
authors.forename: A M
authors.initials: AM
authors.lastname: Nahir
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000097:blood* / Q000473:pathology; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis*; D007132:Immunoglobulin Isotypes / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D012217:Rheumatoid Factor / Q000032:analysis* / Q000276:immunology
chemical_list: D007070:Immunoglobulin A; D007132:Immunoglobulin Isotypes; D007075:Immunoglobulin M; D012217:Rheumatoid Factor