title: Aging in the world: demographic determinants, past trends and long-term perspective to 2075.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003906:Developing Countries; D005060:Europe; D005298:Fertility; D005544:Forecasting; D006801:Humans; D008017:Life Expectancy; D008875:Middle Aged; D009026:Mortality; D011157:Population Dynamics; D014481:United States