Human immunodeficiency virus (HIV) seropositivity in intravenous (i.v.) drug abusers in three cities of Italy: possible natural history of HIV infection in i.v. drug addicts in Italy.
Titti F, Lazzarin A, Costigliola P, Oliva C, Nicoletti L, Negri C, Ricchi E, Donati G, Uberti-Foppa C, Re MC. J Med Virol. 1987 Nov; 23(3):241-8.