TOBACCO.

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What Happens When You Quit Smoking? (n.d.). Retrieved January 17, 2017, from http://www.stopthesmokes.com/what-happens-when-you-quit-smoking

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Cherath, L., & Sullivan, M. (2014). Cancer. In K. L. Lerner & B. W. Lerner (Eds.), The Gale Encyclopedia of Science (5th ed.). Farmington Hills, MI: Gale. Retrieved from http://link.galegroup.com/apps/doc/CV2644030387/SCIC?u=peel_dsb&xid=c1bf4f9b

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