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http://www.ksdk.com/story/news/2014/04/15/marijuana-use-linked-to-brain-changes/7754613/
Casual marijuana use linked to brain changes
Karen Weintraub, Special for USA TODAY 5:40 p.m. CDT April 15, 2014
Using marijuana a few times a week is enough to physically alter critical brain structures, according to a new study published Tuesday in The Journal of Neuroscience.
"Just casual use appears to create changes in the brain in areas you don't want to change," said Hans Breiter, a psychiatrist and mathematician at the Northwestern University Feinberg School of Medicine in Chicago, who led the new study...