About Article Metrics
Publication History
- Originally published1 May 2000
- Published in print1 May 2000
License information
EHP is an open-access journal published with support from the National Institute of Environmental Health Sciences, National Institutes of Health. All content is public domain unless otherwise noted.
Note to readers with disabilities
EHP
strives to ensure that all journal content is accessible to all readers. However, some figures and Supplemental
Material published in
EHP
articles may not conform to
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due to the complexity of the information being presented. If you need assistance accessing journal content, please
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