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When ingested, they bind to cannabinoid receptors (CB1 and CB2) found in the brain
Dan Romer, Associate Director of the Center, says the Annenberg research involved experiments in which smokers were shown warning labels while they were in an fMRI machine, to see how their brains reacted to the images
"Evidence brief: Tobacco point-of-sale display bans" (PDF)
Stocking Convenience Fewer trips to the store
Some people prefer visual alerts rather than numbers or charts that can be challenging to decipher