Fig. 2From: Perceptions of friendship, peers and influence on adolescent smoking according to tobacco control context: a systematic review and meta-ethnography of qualitative researchYear of introduction of comprehensive tobacco legislation by country/region. 1= British Columbia and Western Canadian Province, 2= Toronto and Vancouver, 3= Scotland, 4= England and Northern Ireland, 5= Hawaii, 6= Utah, 7= Newbraska, 8= TexasBack to article page