med.mahidol.ac.th · 1980— 2020 gurrñthnnormó (the *graying. world "graying" of the...
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- med.mahidol.ac.th · 1980— 2020 gurrñthnnormó (the *graying. world "graying" of the population) 2000 600 2 3 1960 1980- 2020 95 2402 2543 2513 7 2535-2539/ 2583-
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