National Institute on Drug Abuse
![100px](https://upload.wikimedia.org/wikipedia/commons/5/55/William_Pollin.jpg)
The institute has conducted an in-depth study of addiction according to its biological, behavioral and social components. It has also supported many treatments such as nicotine patches and gums, and performed research into AIDS and other drug-related diseases. Its monopoly on the supply of research-grade marijuana has proved controversial. Provided by Wikipedia
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