“The perception that cannabis is a safe drug is a mistaken reaction to a past history of exaggeration of its health risks.”

Marijuana can cause mental disorders, loss of intelligence: 20-year study, New York Daily News, 7 October 2014, 7 October 2014, Engel, Meredith http://www.nydailynews.com/life-style/health/marijuana-mental-disorders-loss-intelligence-20-year-study-article-1.1965934,

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Wayne Denis Hall 1
Australian academic 1951

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