Dr. Vickerman herself that her results do not in any way indicate that electronic cigarettes are less effective than NRT, stating: "It may be that callers who had struggled to quit in the past were more likely to try e-cigarettes as a new method to help them quit. These callers may have had a more difficult time quitting, regardless of their e-cigarette use."

Dr. Dutra states: "E-cigarettes are likely to be gateway devices for nicotine addiction among youth, opening up a whole new market for tobacco."

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