1. US Environmental Protection Agency; Mid-Continent Ecology Division; Duluth Minnesota
2. Toxicology and Environmental Research and Consulting; The Dow Chemical Company; Midland Michigan USA
3. Helmholtz Centre for Environmental Research-UFZ; Leipzig Germany
4. Environmental and Regulatory Resources (ER ); Durham North Carolina USA
5. Michigan State University; Fisheries and Wildlife; East Lansing Michigan USA
6. Society of Environmental Toxicology and Chemistry; Durham North Carolina USA
7. Environmental Laboratory; US Army Engineer Research and Development Center; Vicksburg Mississippi