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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: Drug Alcohol Depend. 2019 May 29;201:29–37. doi: 10.1016/j.drugalcdep.2019.03.023

Figure 1.

Figure 1.

Prisma flow diagram for study selection.

*Note. Lack of health control group (n = 2); lack of major white matter tract (n = 3); dissertation/conference paper/abstract (n = 10); duplicate data set (n = 5); insufficient information (n = 3).