Letters to the editor: Life expectancy of modern U. S. presidents.
D005197:Famous Persons; D006076:Government; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008017:Life Expectancy; D009026:Mortality; D013315:Stress, Psychological; D006113:United Kingdom; D014481:United States