Reference

“The Health Consequences of Smoking—50 Years of Progress: A Report of the Surgeon General, 2014,” http://www.surgeongeneral.gov/library/reports/50-years-of-progress/#fullreport, accessed September 1, 2016.
“Policy Recommendations for Smoking Cessation and Treatment of Tobacco Dependence,” World Health Organization, 2003, http://www.who.int/tobacco/resources/publications/tobacco_dependence/en/, accessed August 25, 2017.
Last updated: October 12, 2017
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