Dr. Glantz writes: "Evidence that e-cigarette aerosol has the same effects on an important measure of lung function as cigarette smoke undermines the assumption that e-cigarettes are uniformly less risky than conventional cigarettes."

For example, Stan Glantz argued against electronic cigarettes in a Scientific American , claiming that: "We’ve found very high levels of dual use [traditional cigarettes along with e-cigarette use]. Very few people have switched away from cigarettes or managed to use them as a bridge to eventually go off cigarettes."

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