1. Emerging Methods Section, Aquatic Contaminants Research Division, Water Science & Technology Directorate; Environment Canada; Ontario Canada
2. Axys Analytical Services; Sidney British Columbia Canada
3. Department of Biology; University of Waterloo; Ontario Canada
4. Ecosystems Research Division, National Exposure Research Laboratory, Office of Research and Development; US Environmental Protection Agency; Athens, Georgia USA
5. Center for Environmental and Human Toxicology & Department of Physiological Sciences; University of Florida, Gainesville; Florida USA