Heavy smokers may need 25 years for heart disease risk to match that of non-smokers after quitting
A new study from South Korea has revealed that heavy smokers may take up to 25 years after quitting for their cardiovascular ...
The New England Journal of Medicine28d
Smoking Habits of High-School Students in Newton, Massachusetts
However, this trend results largely from the relatively high percentage of light smokers among senior girls. The percentage of heavy smokers (5 packages a week or more) is substantially higher ...