“…We did not measure the quantity of advertising in the stores in this study. Studies from California, Ontario, Massachusetts, Guatemala, Argentina and Ireland indicate that the quantity of tobacco POS advertising and displays vary greatly by store type, proximity to schools and neighbourhood socioeconomic status 13 19 21. In addition, sampling primarily occurred during weekdays, and only limited survey collection was performed on weekends, which could result in an oversampling of unemployed individuals.…”