title: General situation and features of geriatric epidemiological study in China.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002681:China; D005260:Female; D005853:Geriatrics; D006299:Health Services for the Aged; D006801:Humans; D008017:Life Expectancy; D008136:Longevity; D008297:Male; D008875:Middle Aged