| http://www.w3.org/ns/prov#value | - This is a serious concern because the overall impact of e-cigarette use on public health remains uncertain.???While the numbers of kids smoking e-cigarettes aren???t huge yet, the fact that they are doubling so quickly is a bad sign, said Dr. Tim McAfee, director of the CDC Office on Smoking and Health. ???I think the thing of most concern is the trend,??? McAfee told NBC News. ???There aren???t m
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