- Correspondence to: Professor S M Rappaport Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina, Chapel Hill, NC, 27599-7431, USA;
- Accepted May 24, 2006
- First published June 6, 2006.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.