Tashkin has spent 30 years studying cannabis. In 2006, he was in charge of a large case-control study on marijuana and the risk of cancer. Contrary to his group's expectations, the study found no increase in lung cancer risk even among heavy users of marijuana.
- Marc Kaufman (May 26, 2006). "Study Finds No Cancer-Marijuana Connection". The Washington Post. Retrieved October 10, 2013.
- Szalavitz, Maia (January 10, 2012). "Study: Smoking Marijuana Not Linked with Lung Damage". Time. Retrieved September 26, 2015.
- "Donald P. Tashkin, M.D". University of California, Los Angeles. Archived from the original on October 10, 2013. Retrieved October 10, 2013.
- "There Seems to Be No Link between Marijuana Use and Lung Cancer". May 24, 2006. Retrieved April 16, 2016.
- "Feds' Top Pot Researcher Says Marijuana Should Be Legal". The National Organization for the Reform of Marijuana Laws. June 18, 2009. Retrieved October 10, 2013.
- "Media Ignored Expert's Shocking Findings That Marijuana Helps Prevent Lung Cancer: Now It's Med-School Material". Patients for Medical Cannabis. Retrieved October 10, 2013.
- Biello, David (May 25, 2006). "Large Study Finds No Link between Marijuana and Lung Cancer". Scientific American. Retrieved March 20, 2016.
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