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[Comment] A better world towards convergence of longevity?

Forecasting life expectancy by age and sex is broadly used for research and planning of health sevices, social services, pensions, and economics, and has been developed at the national and multicountry levels.1–3 The basic idea for predicting life expectancy is closely related to the concept of epidemiological transition.4 However, the idea is neither entirely based on evidence nor well-defined methodologically.2 Improvement in life expectancy is achieved through reductions in infant and younger age mortality and the progressive delay of mortality among older people.

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