title: [When does old age begin?].
mesh_terms: D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D000368:Aged; D003710:Demography; D005069:Evaluation Studies as Topic; D011153:Population; D011154:Population Characteristics; D012106:Research
keywords: Adult; Age Distribution; Age Factors; Aged; Demographic Factors; Evaluation; Evaluation Methodology; Population; Population Characteristics; Population Statistics; Research Methodology
vernacular_title: Kiedy zacsyna sie starosc?