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This work highlights the dynamic nature of intrapulmonary exposures and underscores the need to account for lung physiology and environmental factors when assessing inhaled e-cig aerosols

Differences include: The amount of carbon used The size and shape of the carbon granules The length of the filter Airflow design (how tight or open the draw is) Extra materials used with the carbon A filter with more carbon and a better design may trap more of certain compounds than a small filter with less carbon

Others include take-home whitening trays for the patient to use at their convenience

and require consumer education and warnings to customers, among other things

alone or nearly 20% of all deaths

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