1. Ministry of Health (2022, January 05). Statistics of Smoking in Saudi Arabia, Available online: https://www.moh.gov.sa/HealthAwareness/EducationalContent/Anti-Smoking/Pages/default.aspx.
2. World Health Organization (2022, January 05). WHO Launches New Report on Global Tobacco Use Trends. Available online: https://www.who.int/news-room/detail/19-12-2019-who-launches-new-report-on-global-tobacco-use-trends.
3. World Health Organization (2022, January 05). Tobacco Key Facts. Available online: https://www.who.int/news-room/fact-sheets/detail/tobacco.
4. Centers for Disease Control and Prevention (2022, January 05). Health Effects of Cigarette Smoking, Available online: https://www.cdc.gov/tobacco/data_statistics/fact_sheets/health_effects/effects_cig_smoking/index.htm.
5. Wagnew, F., Eshetie, S., Alebel, A., Dessie, G., Tesema, C., and Abajobir, A.A. (2018). Meta-analysis of the prevalence of tuberculosis in diabetic patients and its association with cigarette smoking in African and Asian countries. BMC Res. Notes, 11.