how many cigarettes a day is considered a smoker Heavy Smoking? How many do you guys

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Methods Our research group has previously published a detailed description of the study protocol (NCT02247908) that we pilot tested in July and August 2014 with 56 adult smokers in North Carolina (Supplement 1)

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Additionally, smoking: Constantly increases heart rate and blood pressure Shrinks and stretches blood vessels, depriving them of oxygen Reduces blood flow to the kidneys, heart, and other vital organs Damages the arteries over time Hardens renal arteries Smoking can cause blood pressure problems that could lead to heart or respiratory problems