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Could Even Casual Marijuana Use Alter Your Brain?

A new study conducted by researchers at Northwestern and Harvard suggests even casual marijuana use can alter your brain.

http://www.wgrz.com/video/3475210130001/1/Could-Even-Casual-Marijuana-Use-Alter-Your-Brain http://cdn.newslook.com/5a/5ad920e797cfdfc4bdfbcabd9a48f487/images/frame_ext.jpg Could Even Casual Marijuana Use Alter Your Brain? A new study conducted by researchers at Northwestern and Harvard suggests even casual marijuana use can alter your brain. newslookscience 01:47

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