can one cigarette cause a heart attack day 'increases disease and stroke risk' Chart: A Cigarette a Day

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[16] Therefore, a pneumothorax can only develop if air is allowed to enter, through damage to the chest wall or to the lung itself, or occasionally because microorganisms in the pleural space produce gas

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Perception of smoking risk was assessed with the question On a scale of 1 (not at all) to 10 (extremely), how dangerous do you think smoking cigarettes is to your health? Because responses to this item were severely skewed, we dichotomized at the median (M = 9