<http://schema.org/alternativeHeadline>
"A new study links marijuana use with abnormalities in two key regions in the brain, but scientists are unsure if these changes are ultimately harmful."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/even-casual-marijuana-use-changes-the-brain>