ahlam1399
01-13-2017, 09:18 AM
The National Academies of Sciences, Engineering and Medicine sorted through 10,000 studies to determine the good and bad health effects of marijuana. Tight drug restrictions impede research, they say.
أكثر... (http://www.npr.org/sections/health-shots/2017/01/12/509488977/marijuanas-health-effects-scientists-weigh-in?utm_medium=RSS&utm_campaign=news)
أكثر... (http://www.npr.org/sections/health-shots/2017/01/12/509488977/marijuanas-health-effects-scientists-weigh-in?utm_medium=RSS&utm_campaign=news)