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| Past efforts - Data collection on national |
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| n | National
Institutes of Dental Research (now the |
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| NIDCR) |
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| – | 1979-80 and
1986-87 |
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| • | surveyed children
5-17 yrs |
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| – | 1985-86 |
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| • | surveyed employed
adults and seniors |
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| 5 |