title: Biological false positive serological tests for syphilis among drug addicts.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004586:Electrophoresis; D005189:False Positive Reactions; D005260:Female; D005455:Fluorescent Antibody Technique; D006386:Hemagglutination Tests; D006511:Hepatitis B Antigens; D003932:Heroin / Q000008:administration & dosage; D006556:Heroin Dependence; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D008875:Middle Aged; D019966:Substance-Related Disorders; D013588:Syphilis Serodiagnosis; D014210:Treponema pallidum / Q000276:immunology
chemical_list: D006511:Hepatitis B Antigens; D003932:Heroin