<http://schema.org/description>
"Researchers have found clear associations between marijuana use in young males and cyclic vomiting syndrome (CVS), where patients experience episodes of vomiting separated by symptom free intervals."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2012-01-marijuana-cyclic-vomiting-syndrome-young.html>