title: Seronegative (reactive) arthropathy: precipitating factors.
mesh_terms: D001168:Arthritis / Q000209:etiology* / Q000276:immunology; D002690:Chlamydia Infections / Q000150:complications* / Q000276:immunology; D002692:Chlamydia trachomatis; D005260:Female; D006801:Humans