Multimethod research from targeted sampling to HIV risk environments.
Bluthenthal
R N
RN
Department of Family and Community, University of California-San Francisco 94143-1304, USA.
Watters
J K
JK
D002140:California / Q000453:epidemiology; D004812:Epidemiologic Methods; D015658:HIV Infections / Q000453:epidemiology / Q000523:psychology / Q000635:transmission*; D006801:Humans; D012107:Research Design; D012307:Risk Factors; D012309:Risk-Taking; D012931:Social Environment; D015819:Substance Abuse, Intravenous / Q000523:psychology