| Principles and Concepts |
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| w | Assessing
risks from chronic exposure is |
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| complicated
and difficult |
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| n | Epidemiological
studies: assess health trends and |
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| associations |
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| n | Risk
assessment: combines toxicological |
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| research
(often animal studies) with estimated |
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| exposures
to determine estimates of risk |
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| N5290, Sept. 27, 2004 |