“…The final sample of 20 sources included journal articles [24–34], research reports [22, 35–37], parliamentary submissions and ministerial reports [38–40], a research theses [41] and a journal editorial [42]. Sixteen sources were quantitative analysis [25–27, 29, 31, 32, 34–37, 41], four provided qualitative findings [22, 24, 28, 33] and two presented only evaluative impressions of the project's impact [40, 42]. The sources came from four different fields of inquiry: criminology and policing [28, 32, 33, 35, 37–41], alcohol and other drugs [22, 29–31, 34, 36], pharmacy [24, 26, 27, 42] and policy [25].…”