“…If at the time of the study such ads were more likely to appear in media channels assessed by our measures (e.g., magazines), this could have affected our results. Similarly, if advertising through channels not captured by our measure differentially affect males, such as point-of-sale promotions or event sponsorships (e.g., music, sports), this could have influenced our findings as well (Hafez & Ling, 2006;Henriksen, Feighery, Wang & Fortmann, 2004;Siegel, 2001). Continued investigation into gender differences in adolescent exposure to tobacco advertising, particularly as tobacco companies shift the channels through which they promote their products in light of increasingly stronger advertising restrictions (e.g., Freeman & Chapman, 2010), is an important avenue for future research to clarify these results.…”