“…The existing studies on regional or within-country mortality differences have mentioned a potential role of smoking (e.g., Papastergiou et al 2008;Bonneux, Huisman, and de Beer 2010), for example in relation to socio-economic differences in mortality (e.g., Kunst, Looman, and Mackenbach 1990;Spijker 2004;Mackenbach, Kunst, and Looman 1991;Mackenbach, Looman, and Kunst 1989), but these studies did not examine the contribution of smoking to all-cause mortality. To assess the impact of tobacco on society, estimates of smoking-attributable mortality are regarded as very useful tools (e.g., Oliveira, Valente, and Leite 2008;Perez-Rios and Montes 2008). Based on the literature reviews on smoking-attributable mortality (Oliveira, Valente, and Leite 2008;Perez-Rios and Montes 2008) we can conclude that many studies have estimated smoking-attributable mortality, although national-level studies are much more common than regional studies, and different estimation methods have been used.…”