As marijuana becomes more accepted --and in some places, legal -- a UCLA researcher has reexamined the question: does smoking marijuana cause lung cancer?
In the June edition of Annals of the American Thoracic Society, Donald P. Tashkin, MD, emeritus professor of medicine at UCLA's David Geffen School of Medicine, says that light to moderate marijuana use does not cause increased lung cancer risk and that the verdict is not out on heavy use.
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