Citation:
Hummel, K. , Nagelhout, G. E. , Willemsen, M. C. , Driezen, P. , Springvloet, L. , Mons, U. , Kunst, A. E. , et al. (2015). Trends and socioeconomic differences in policy triggers for thinking about quitting smoking: Findings from the International Tobacco Control (ITC) Europe Surveys. Drug and Alcohol Dependence. doi:10.1016/j.drugalcdep.2015.07.678