B. Powis

Reaching hidden populations of drug users by privileged access interviewers: methodological and practical issues

Peter Griffiths, M. Gossop, B. Powis et al. · Addiction · 1993 · 292 citations

Frequency of non-fatal heroin overdose: survey of heroin users recruited in non-clinical settings: Table 1

Michael Gossop, Paul Griffiths, B. Powis et al. · BMJ · 1996 · 185 citations · Full text

Female prostitutes in south London: Use of heroin, cocaine and alcohol, and their relationship to health risk behaviours

Michael Gossop, B. Powis, Paul Griffiths et al. · AIDS Care · 1995 · 76 citations

Substance Use, Social Sciences, Health Risk Behaviours +18

Severity of heroin dependence and HIV risk. II. Sharing injecting equipment

Michael Gossop, Paul Griffiths, B. Powis et al. · AIDS Care · 1993 · 52 citations

Substance Use, Infected Blood, Drug Policy +18

First use of heroin: changes in route of administration over time.

John Strang, Paul Griffiths, B. Powis et al. · BMJ · 1992 · 49 citations · Full text

Opioid Epidemic, Substance Abuse, Substance Use +12