These data all but destroy the gateway hypothesis. They demonstrate that at the current time, the evidence simply does not support the assertion that the proliferation of e-cigarette use among youth is leading to increased smoking initiation. Electronic cigarettes are not leading to a lifetime addiction to cigarette smoking among our nation's youth.

One of the features that separates tobacco control research from research conducting historically by the tobacco companies is the integrity of our work. We want and need the public to view the integrity of tobacco control research as being higher than that of work which in the past was conducted by the tobacco companies. If it comes down to tobacco control researchers arguing that secondhand smoke is harmful and tobacco industry-funded studies suggesting that secondhand smoke is not harmful, we want the public to believe us. That requires that the public view our research integrity as being greater than that of the industry.

For the University of Kentucky Cancer Center:

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