| antibodies to epstein-barr virus associated antigens in pima indians with and without rheumatoid arthritis. | we investigated anti-rheumatoid arthritis-associated nuclear antigens (rana) and other anti-epstein-barr virus (ebv) antibodies in a uniquely controlled study in female pima indians of arizona, an ra prone population. four groups of age and sex-matched individuals were formulated: (1) individuals positive for rheumatoid factor (rf) who had clinical evidence of rheumatoid arthritis (ra); (2) individuals seropositive for rf, but without arthritis; (3) individuals seronegative for rf, but with vari ... | 1983 | 6312543 |