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These methodological limitations included the lack of consistency and variation in the definition of smoking, both in terms of duration and quantity of smoking

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PMID 22797832

That said, smoking cessation strategies have limited efficacy, and recent data indicated that multiple medications and interventions may be required for success

The inhaler comes with several nicotine cartridges, which are inserted into the inhaler and "puffed" for about 20 minutes, up to 16 times a day

Prevention Strategies Preventing hepatitis B and hepatitis C involves different approaches due to the availability of a vaccine for hepatitis B but not for hepatitis C