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"Characterising smoking and nicotine use behaviours among women of reproductive age: a 10-year population study in England"
Convenience : Saliva testing can be done very easily on-site, which means it's convenient for workplaces or other settings where immediate results are needed
Users can start with higher nicotine concentrations that satisfy their cravings, then systematically lower the strength over weeks or months until they reach zero nicotine, or even stop using the device entirely
They found that men who smoked one cigarette per day had 46% of the excess risk of heart disease and 41% of the excess risk of stroke associated with smoking 20 cigarettes per day (much higher than the expected one 20th, or 5%)
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