Maintaining low HIV seroprevalence among injecting drug users.
Morrison
C L
CL
Ruben
S M
SM
D004739:England / Q000453:epidemiology; D015658:HIV Infections / Q000517:prevention & control*; D015528:HIV Seroprevalence; D006801:Humans; D018671:Needle-Exchange Programs; D015819:Substance Abuse, Intravenous