1. Center for Disease Control and Prevention (CDC): Annual smoking-attributable mortality, years of potential life lost, and productivity losses—United States, 1997–2001. MMWR Morb Mortal Wkly Rep 2005, 54:625–628.
2. Centers for Disease Control and Prevention (CDC): Annual smoking-attributable mortality, years of potential life lost, and economic costs—United States, 1995–1999. MMWR Morb Mortal Wkly Rep 2002, 51:300–303.
3. Centers for Disease Control and Prevention (CDC): Cigarette smoking among adults—United States, 2004. MMWR Morb Mortal Wkly Rep 2005, 54:1121–1124.
4. Nestler EJ: Is there a common molecular pathway for addiction? Nat Neurosci 2005, 8:1445–1449.
5. Laviolette SR, van der Kooy D: The neurobiology of nicotine addiction: bridging the gap from molecules to behaviour. Nat Rev Neurosci 2004, 5:55–65.