Changing concepts of morbidity and mortality in the elderly population.
D000368:Aged; D002908:Chronic Disease; D005260:Female; D005544:Forecasting; D006801:Humans; D008017:Life Expectancy; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D009017:Morbidity; D009026:Mortality; D011157:Population Dynamics; D011640:Public Policy; D012106:Research; D014481:United States