title: Concurrent partnerships and syphilis persistence: new thoughts on an old puzzle.
authors.forename: M
authors.initials: M
authors.lastname: Morris
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D012307:Risk Factors; D012725:Sexual Behavior; D012747:Sexual Partners; D013587:Syphilis / Q000453:epidemiology* / Q000517:prevention & control / Q000635:transmission*; D014481:United States / Q000453:epidemiology