1. Protection against viral hepatitis;MMWR Morb Mortal Wkly Rep,1990
2. Seropositivity of viral infections among intravenous drug users in northern California;Zeldis;West J Med,1992
3. Viral infections in short-term injection drug users;Garfien;Am J Public Health,1996
4. HIV prevalence among intravenous drug users;Kaplan;J Acquir Immune Defic Syndr,1992
5. Syringe and needle exchange programs;Schwartz;South Med J,1993