Abstract: Research ArticleOpen AccessAn all-consuming issue. C W Schmidt C W Schmidt Search for more papers by this author Published:1 March 1999https://doi.org/10.1289/ehp.99107a144AboutSectionsPDF ToolsDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InReddit FiguresReferencesRelatedDetails Vol. 107, No. 3 March 1999Metrics About Article Metrics Publication History Originally published1 March 1999Published in print1 March 1999 Financial disclosuresPDF download 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 508 standards due to the complexity of the information being presented. If you need assistance accessing journal content, please contact [email protected]. Our staff will work with you to assess and meet your accessibility needs within 3 working days.