International Journal of Drug Policy
Volume 21, Issue 3 , Pages 215-221, May 2010

How to find non-dependent opiate users: A comparison of sampling methods in a field study of opium and heroin users

University of Amsterdam, Law Faculty, Bonger Institute of Criminology, Amsterdam, Netherlands

Received 9 June 2009; received in revised form 13 August 2009; accepted 15 August 2009. published online 11 September 2009.

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PII: S0955-3959(09)00116-9

doi:10.1016/j.drugpo.2009.08.005

International Journal of Drug Policy
Volume 21, Issue 3 , Pages 215-221, May 2010

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