@book{523764,
	author = {Gravely, S. and et al.},
	title = {Implementation of key demand-reduction measures of the WHO Framework Convention on Tobacco Control and change in smoking prevalence in 126 countries: an association study},
	url = {http://www.thelancet.com/pdfs/journals/lanpub/PIIS2468-2667(17)30045-2.pdf}
}