1. National Center for Environmental Assessment (NCEA); U.S. Environmental Protection Agency (USEPA); Washington D.C. USA
2. National Exposure Research Laboratory (NERL); USEPA; Cincinnati Ohio USA
3. Southwest Watershed Research Center; USDA-Agricultural Research Service; Tucson Arizona USA
4. NERL; USEPA; Las Vegas Nevada USA
5. Office of Water; U.S. Environmental Protection Agency (USEPA); Washington D.C. USA
6. National Health and Environmental Effects Research Laboratory; USEPA; Corvallis Oregon USA
7. NCEA; USEPA; Cincinnati Ohio USA
8. Geosciences and Environmental Change Science Center; U.S. Geological Survey; Denver Colorado USA