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*Correspondence: Cassio Luiz Coutinho Almeida-da-Silva, [email protected] Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers

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These themes were synthesised into seven meta-themes that explain what intervention functions could be used in preparatory schools to enhance pupils capability, opportunity and motivation to avoid smoking, see Table 2

ETS has been classified as a toxic air contaminant by regulatory bodies including the California Air Resources Board (CARB)