Krewski, Daniel Toxicity testing in the 21st century: implications for human health risk assessment. [electronic resource] - Risk analysis : an official publication of the Society for Risk Analysis Apr 2009 - 474-9 p. digital Publication Type: Historical Article; Journal Article ISSN: 1539-6924 Standard No.: 10.1111/j.1539-6924.2008.01150.x doi Subjects--Topical Terms: AnimalsEnvironmental ExposureEnvironmental Pollutants--toxicityHistory, 21st CenturyHumansRisk AssessmentToxicity Tests--methods