We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleRisks for HIV infection among users and sellers of crack, powder cocaine and heroin in central Harlem: implications for interventions.AuthorsDavis WR; Johnson BD; Randolph D; Liberty HJPublicationAIDS Care, 2006, Vol 18, Issue 2, p158ISSN0954-0121Publication typearticleDOI10.1080/09540120500162114