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A growing new trend is electronic cigarettes (often referred to as "e-Cigs," "vapor cigarettes," or "vapes")

But the handful of the thousands of chemicals that are the combustion products of tobacco

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Well, it is simple

As cotinine is completely cleared from the system after 3 days of smoke exposure, we quantified cotinine levels in plasma after 1, 2 and 3 days of treatment in low-dose and high-dose groups to check the exposure level to tobacco smoke (Fig