The study, called the National Lung Screening Trial, focused on a specific high‐risk group: 53,000 current and former heavy smokers, aging from 55 to 74, which had smoked for at least 30 pack‐years
A. group: 53,000 current and former heavy smokers, aging from 55 to 74, which had smoked for at least 30 pack‐years
B. group: 53,000 current and former heavy smokers, aged 55 to 74, that had smoked for at least 30 pack‐years
C. group: 53,000 current and former heavy smokers, aged 55 to 74, who
...
A. group: 53,000 current and former heavy smokers, aging from 55 to 74, which had smoked for at least 30 pack‐years
B. group: 53,000 current and former heavy smokers, aged 55 to 74, that had smoked for at least 30 pack‐years
C. group: 53,000 current and former heavy smokers, aged 55 to 74, who
...
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