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A comprehensive federal study conducted by the National Academy of Sciences Institute of Medicine arrived at a similar conclusion: "Millions of Americans have tried marijuana, but most are not regular users [and] few marijuana users become dependent on it [A]lthough [some] marijuana users develop dependence, they appear to be less likely to do so than users of other drugs (including alcohol and nicotine), and marijuana dependence appears to be less severe than dependence on other drugs." Alcohol use increases the risk of injury to the consumer

The authors are grateful to Sarah Scholl for overseeing conduct of the study, to Neha Mehta for preparation of data displays, and to Alexandra Cardy for editorial assistance

There were almost definitely more cheers than boos, but also maybe just a din of collective noticing

Hierarchical clustering was employed to illustrate differences in transcriptome levels between smokers and non-smokers in the oral mucosa, using Spearman correlation as a distance measure and the Unweighted Pair Group Method with Arithmetic Mean (UPGMA) for clustering

Effect of transdermal nicotine administration on exercise endurance in men