1. Oak Ridge Institute for Science and Education, U.S. Environmental Protection Agency Corvallis Oregon USA
2. US EPA, Office of Research and Development, Center for Public Health and Environmental Assessment, Pacific Ecological Systems Division Corvallis Oregon USA
3. Department of Fisheries, Wildlife and Conservation Science Oregon State University Corvallis Oregon USA
4. US EPA, Office of Water Washington DC USA
5. Oregon State University, College of Public Health and Human Sciences Corvallis Oregon USA