1. The impact of tobacco use and cessation on nonmalignant and pre-cancerous oral and dental diseases and conditions;Christen,1991
2. Smoking-attributable mortality and years of potential life lost: United States, 1990;MMWR Morb Mortal Wkly Rep,1993
3. Mortality attributable to tobacco use in Canada;Collishaw;Can J Public Health,1988
4. Cigarette smoking among adults: United States, 1994;MMWR Morb Mortal Wkly Rep,1996
5. Canada's health promotion survey 1990: technical report;Stephens,1993