The lowest dose of a substance at which a specified measurable effect is observed and below which it is not observed.
The study of adverse effects of chemicals on living organisms.
Factors used to divide a no-observed-adverse-effect level (LOAEL) to obtain a safe exposure level.
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Review of the U.S. Army's Health Risk Assessments for Oral Exposure to Six Chemical-Warfare Agents . Washington, DC: The National Academies Press,
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