Low frequency of chronic biological false positive reactors to serological tests for syphilis in rheumatoid arthritis and ankylosing spondylitis.
D000328:Adult; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013167:Spondylitis, Ankylosing / Q000276:immunology*; D013588:Syphilis Serodiagnosis