In other words, despite acknowledging that they cannot tell from their study whether e-cigarette use precedes smoking or whether smoking precedes e-cigarette use, they nonetheless draw the conclusion that e-cigarette use precedes smoking.

According to an at Law360.com, the recently-released Surgeon General's report's conclusion that cigarette filters may actually increase the risk of lung cancer could lead to a new wave of class-action lawsuits against cigarette companies.

If you guessed F, then sadly, you are quite correct.

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.

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