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4 Claudication is pain or weakness in the legs that starts with physical activity and stops within minutes of resting

Last October, a global independent safety science company, Underwriters Laboratories, announced the first safety standard for the electrical, heating, battery and charging systems for e-cigarettes

It balances supply and demand for regular and irregular smokers

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Comparing cigarettes to e-cigarettes can give us a false sense of what dangers exist because it misses the gap in understanding how people use them and how they can make people dependent, said first author Matthew Olonoff, a Ph.D