title: 20 years of HIV-2 infection in Portugal: trends and changes in epidemiology.
authors.forename: Emília
authors.initials: E
authors.lastname: Valadas
authors.forename: Luís
authors.initials: L
authors.lastname: França
authors.forename: Sara
authors.initials: S
authors.lastname: Sousa
authors.forename: Francisco
authors.initials: F
authors.lastname: Antunes
mesh_terms: D000328:Adult; D006169:Guinea-Bissau / Q000453:epidemiology / Q000208:ethnology; D015658:HIV Infections / Q000453:epidemiology*; D015498:HIV-2 / Q000302:isolation & purification*; D006801:Humans; D011174:Portugal / Q000453:epidemiology