Persistent lack of human immunodeficiency virus infection in intravenous drug users at very high risk.
Boiocchi
M
M
Franceschi
S
S
Serraino
D
D
Guarneri
S
S
Tavian
M
M
Diodato
S
S
D005260:Female; D005500:Follow-Up Studies; D015658:HIV Infections / Q000453:epidemiology*; D006679:HIV Seropositivity; D006801:Humans; D008297:Male; D012307:Risk Factors; D015819:Substance Abuse, Intravenous / Q000453:epidemiology*