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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Drug Alcohol Depend. 2012 Nov 26;130(0):77–84. doi: 10.1016/j.drugalcdep.2012.10.025

Figure 1.

Figure 1

Flowchart of participants1 progress through the study. *Group 3Flexible Dose2 (indicated by dotted-line box) existed solely to maintain the blind and was not part of the data analysis specified a priori. Likelihood of allocation to that group was deliberately set low. The main pairwise comparisons of interest were group 3Both2 versus groups 3Neither2 and 3CM2; those three groups were intended to be equal in size The disproportionately large N in group 3CM2 reflects an error in the input to the randomization algorithm for the last 12 participants randomized (see Methods section).