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. 2017 Apr 5;42(9):1752–1765. doi: 10.1038/npp.2017.51

Figure 3.

Figure 3

Forrest plot for meta-analysis examining the opioid-sparing effect of delta-9-THC when co-administered with codeine. Note: all mean difference and SD values are of log10ED50. THC, tetrahydrocannabinol.