As best I can tell, the trick in generating OTC placebo group performance rates in the 3 to 4% range involves two primary factors: (1) frustration of a study participant's expectations of receiving free NRT products by being able to tell within 24-48 hours of quitting smoking that they were not receiving the "real thing"

HEC Press Officer Michel Jacob noted that evaluation of a campaign like this is difficult, since its influence on behaviour can only be measured in the future and, even then, smoking behaviour is governed by a great many factors and subject to a great many influences. He went on to state that It would be idle to pretend, and I think it is idle to pretend, that any health education mass media campaign on its own can make a significant long-term impact on health behaviour. Nonetheless, Jacob was confident that the overwhelming response by children, the favourable reception by schools, and the associated significant coverage by the mass media suggested that the approach is one worthy of development (Health Education Council, 1981b)
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Delivery sales of electronic cigarettes require common carrier to verify the purchasers age through government-issued identification, that the electronic cigarettes are not intended for consumption by anyone under the age of 21 and shall obtain the purchasers signature on a written statement