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Cigarette - Wikipedia
Cigarette | Definition, Facts, & Health Effects | Britannica
Health Effects of Cigarette Smoking | CDC
Current Cigarette Smoking Among Adults in the United States
What's In a Cigarette? | American Lung Association
Cigarettes | FDA - U.S. Food and Drug Administration
Harms of Cigarette Smoking and Health Benefits of Quitting
Fast Facts and Fact Sheets | Smoking and Tobacco Use | CDC
13 effects of smoking cigarettes - Medical News Today
Tobacco - World Health Organization (WHO)