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Interview with UCSF's Dr. Mark J. Pletcher about his study on marijuana's effect on lungs

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Published on Jan 9, 2012

http://www.ucsf.edu/news/2012/01/1128...
UCSF's Dr. Mark J. Pletcher talks about the finding in his study that suggests low to moderate use of marijuana is less harmful to users' lungs than exposure to tobacco, even though the two substances contain many of the same components.

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