title: Variation in rheumatoid factor and antinuclear antibody assays in Auckland laboratories.
mesh_terms: D000974:Antibodies, Antinuclear / Q000032:analysis*; D006801:Humans; D007753:Laboratories / Q000592:standards*; D007841:Latex Fixation Tests; D009520:New Zealand; D012217:Rheumatoid Factor / Q000032:analysis*
chemical_list: D000974:Antibodies, Antinuclear; D012217:Rheumatoid Factor