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. Author manuscript; available in PMC: 2015 Nov 12.
Published in final edited form as: Am J Health Behav. 2014 Nov;38(6):823–830. doi: 10.5993/AJHB.38.6.4

Figure 1.

Figure 1

Study Selection Flow Diagram

Note: s = number of studies; k = number of comparisons; A single study may have more than one treatment vs. control comparison, such as in the case of 2 distinct intervention groups.