1. Cigarette smoking among adults-United States, 2004;Centers for Disease Control and Prevention;MMWR,2005
2. Cigarette smoking among adults-United States, 2006;Centers for Disease Control and Prevention;MMWR,2007
3. Annual smoking-attributable mortality, years of potential life lost, and economic costs--United States, 1995-1999;Centers for Disease Control and Prevention;MMWR,2002
4. Health problems in teenage daily smokers versus nonsmokers, Norway, 1995-1997: the Nord-Trondelag Health Study;Holmen;Am J Epidemiol,2000
5. Effect of cigarette smoking on periodontal status of healthy young adults;Machuca;J Periodontol,2000