1.   Habitual smokers still run the greatest risk of heart disease.

2.   One-quarter of the teenagers became habitual smokers during the study.

3.   Tobacco officials for years swore that nicotine was not addictive, and that the health risks to habitual smokers were non-existent.

4.   She was a habitual smoker of Gauloises browns, said the National Committee Against Nicotine Addiction, which spoke for the family.