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International Journal of Drug Policy > 2006 > 17 > 4 > 304-309
Journal of Substance Abuse Treatment > 2003 > 24 > 4 > 347-355
International Journal of Drug Policy > 2006 > 17 > 4 > 304-309
Journal of Substance Abuse Treatment > 2003 > 24 > 4 > 347-355