References for "Breaking free from nicotine dependence"
Benowitz NL. "Nicotine Addiction," The New England Journal of Medicine (June 17, 2010): Vol. 362, No. 24, pp. 2295–303. www.ncbi.nlm.nih.gov.ezp-prod1.hul.harvard.edu/pubmed/20554984
Fiore MC, et al. Treating Tobacco Use and Dependence: 2008 Update. Clinical Practice Guideline. Rockville, MD: U.S. Department of Health and Human Services, Public Health Service, May 2008. www.surgeongeneral.gov/tobacco/treating_tobacco_use08.pdf