number of carcinogens in cigarettes Top 10 Common Known to Cause Cancer Cancer and Tobacco Use -

They would simply say I dont want to

The amount a person smokes : Heavier smokers may take longer to eliminate nicotine from their system compared to lighter smokers

When More Doctors Smoked Camels: Cigarette Advertising in the [New York State] Journal [ of Medicine ] (6 pages) Article by Alan Blum, MD and Jessica Rosenberg which discusses advertisements in 1954 in the New York State Journal of Medicine and the Journal of the American Medical Association for the KENT Micronite Filter

"Some very explicit, almost gruesome pictures may be necessary," FDA Commissioner Margaret Hamburg said in an interview with The Associated Press