Cannabis--safe or sinister?
D000293:Adolescent; D000328:Adult; D002188:Cannabis / Q000009:adverse effects*; D002552:Cerebral Ventricles / Q000187:drug effects*; D006261:Headache / Q000209:etiology; D006801:Humans; D008568:Memory / Q000187:drug effects; D011011:Pneumoencephalography