Key findings Among the cohort of nonheavy smokers, the median pack-year smoking history was 7.6 pack-years (IQR, 3.3-13.5) for the 615 former smokers with 15 or more years of smoking cessation, 10 pack-years (IQR, 5.3-14.9) for the 146 former smokers with less than 15 years of smoking cessation and 11.4 pack-years (IQR, 7.3-14.4) for the 100 current smokers
In 2019, the President signed legislation raising the federal minimum age for tobacco product sales to 21, up from 18
Archived from the original on 2022-10-03
Krzyzanowski M, Robbins DR, Lebowitz MD: Smoking cessation and changes in respiratory symptoms in two populations followed for 13 years
Gene-expression profiling reveals distinct expression patterns for Classic versus Variant Merkel cell phenotypes and new classifier genes to distinguish Merkel cell from small-cell lung carcinoma