title: Applying the methodology of participant observation to the study of injection-related HIV risks.
authors.affiliation: University of Colorado, Health Sciences Center, Project SAFE, Denver 80211, USA.
authors.forename: S
authors.initials: S
authors.lastname: Koester
mesh_terms: D003469:Culture; D015658:HIV Infections / Q000523:psychology / Q000635:transmission*; D006801:Humans; D012307:Risk Factors; D015819:Substance Abuse, Intravenous / Q000150:complications* / Q000523:psychology