title: Lack of association between concurrency and HIV infection: an artifact of study design.
authors.forename: Amelia
authors.initials: A
authors.lastname: Knopf
authors.forename: Martina
authors.initials: M
authors.lastname: Morris
mesh_terms: D005114:Extramarital Relations; D005260:Female; D015658:HIV Infections / Q000453:epidemiology*; D006801:Humans; D008297:Male