1. The health consequences of smoking: a report of the Surgeon General,2004
2. Tobacco use among adults: United States,2005
3. Pierce JP How many adolescents start smoking each day in the United States?;Gilpin;J Adolesc Health.,1999
4. BakerTB, et al. Treating tobacco use and dependence: 2008 update. Clinical practice guideline;Fiore,2008
5. Combined use of nicotine replacement products;Fagerström;Health Values J Health Behavior Ed Promotion,1994