Ads on TV and radio will be subject to scheduling restrictions to reduce the chance of e-cigarette advertisements being seen or heard by children. Furthermore, unless manufacturers obtain an authorisation for their product from the Medicines and Healthcare products Regulatory Agency, ads for e-cigarettes cannot convey health benefits or claim that they are ‘safer’ or ‘healthier’ than smoking tobacco."

A third major advantage of a clinical trial is that conditions are controlled as carefully as possible, minimizing potential biases. Both sampling and measurement bias are greatly reduced, if not eliminated. In contrast, survey studies are generally subject to significant sampling and measurement bias.

The Rest of the Story issued a call for a by CDC to clarify this error, but none was forthcoming.

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