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In the supplemental materials for the article beginning on page 640 in the 30 July 2015 issue, there was an error in supplemental Figure 6A. The figure inadvertently showed a blot obtained from Kasumi-1 cells treated with cannabidiol (CBD). It should have shown a blot of AKT in AE9a cells treated with CBD. The error to supplemental Figure 6 has been corrected in the online supplemental materials.