cigarette smoking effects on respiratory system What Happens to Your Lungs When You Smoke Smoking - The respiratory system
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Wei, B., OConnor, R
The nicotine math is the same as disposables: multiply strength by volume

Tips are additional

38 When smokers are asked by a survey interviewer about how harmful their habit is, the smokers admit that there is an element of self-damage in what they are doing, but they tend to downplay the degree of that damage (a classic case of cognitive dissonance, says Gallup)