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. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: Drug Alcohol Depend. 2013 Oct 24;134:10.1016/j.drugalcdep.2013.10.011. doi: 10.1016/j.drugalcdep.2013.10.011

Figure 2. PRISMA Diagram.

Figure 2

Flow chart of studies identified through systematic literature search reviewed for inclusion in the systematic review