1. Centers for Disease Control and Prevention, Mortality 1999-2020 on cdc wonder online database, released in 2021, https://wonder.cdc.gov/Deaths-by-Underlying-Cause.html.
2. World Health Organization, The top 10 causes of death, https://www.who.int/news-room/fact-sheets/detail/the-top-10-causes-of-death.
3. Prevalence of Uncontrolled Risk Factors for Cardiovascular Disease: United States, 1999-2010, No. 103;Fryar,2012
4. Sudden cardiac death: epidemiology and risk factors;Adabag;Nat. Rev. Cardiol.,2010
5. Physiology of the Heart;Katz,1992