1. World Health Organization. Tobacco: Deadly in any Form and Disguise. World Health Organization, WHO Press: Geneva, Switzerland, 2006.
2. Centers for Disease Control and Prevention. Symptoms of substance dependence associated with use of cigarettes, alcohol, and illicit drugs—United Sates, 1991–1992. MMWR 1995; 44: 831–839.
3. Hughes J, Stead L, Lancaster T . Antidepressants for smoking cessation. Cochrane Database Syst Rev 2004; 4: CD000031.
4. Stead LF, Perera R, Bullen C, Mant D, Lancaster T . Nicotine replacement therapy for smoking cessation. Cochrane Database Syst Rev 2008; 1: CD000146.
5. Rose JE . Nicotine and nonnicotine factors in cigarette addiction. Psychopharmacology (Berlin) 2006; 184: 274–285.