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This brings up the immediate question of how to go about accurately measuring exposure and outcomes
Large billboards were also used, but they were comparatively expensive
Patients smoking 1-2 packs or more per day are significantly more likely to have a higher risk of death compared to those who smoke less than one pack per day
(3) The proprietor or other person in charge of an enclosed indoor workplace where a smoking cessation program, medical research, or scientific research is conducted or performed must conspicuously post, or cause to be posted, signs stating that smoking is permitted for such purposes in designated areas in the enclosed indoor workplace
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