1. World Health Organization [Internet]. Prevalence of tobacco use. Global Health Observatory (GHO) data. [updated 2015 June 9; cited 2015 July 15]. Available from: http://www.who.int/gho/tobacco/use/en/.
2. Youth risk behavior surveillance—United States, 2011;Centers for Disease Control and Prevention;MMWR,2012
3. Patterns of adolescent smoking and later nicotine dependence in young adults: a 10-year prospective study;Van De Ven;Public Health,2016
4. Smoking behaviours of current cancer patients in Canada;Liu;Curr Oncol,2016
5. Contribution of smoking-related and alcohol-related deaths to the gender gap in mortality: evidence from 30 European countries;McCartney;Tob Control,2010