The article and commentary criticize tobacco companies for changing their labeling of "light" and "ultra-light" cigarette brands by removing these terms and instead, giving the brands different colors to differentiate them.

The authors write: "Consistent with the only other longitudinal population-level study with 1-year follow-up that we are aware of, we found that e-cigarette use by smokers was not followed by greater rates of quitting or by reduction in cigarette consumption 1 year later."

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