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2. Smokeless Tobacco Use Among Adolescents in Global Perspective
3. World Health Organization (2017) WHO Report on the Global Tobacco Epidemic, 2017: Monitoring Tobacco Use and Prevention Policies. Geneva.
4. World Health Organization (2019) WHO Report on Global Tobacco Epidemic, 2019: Offer Help to Quit Tobacco. Geneva.
5. World Health Organization (2020) WHO Global Report on Trends in Prevalence of Tobacco Smoking.