1. 1. US Department of Health and Human Services. The Health Consequences of Smoking: What It Means to You. Washington, DC: US Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health; 2004.
2. Use of smoking-cessation treatments in the United states;Shiffman;Am J Prev Med,2008
3. Nicotine replacement therapy for smoking cessation;Silagy;Cochrane Database Syst Rev,2004
4. Randomised controlled trial of nicotine chewing-gum;Jarvis;BMJ,1982