1. Centers for Disease Control and Prevention, Atlanta, Georgia, USA
2. U.S. Environmental Protection Agency, Research Triangle Park, North Carolina, USA
3. Columbia University, New York, New York, USA
4. University of Georgia, Athens, Georgia, USA
5. Consultant, Research Triangle Park, North Carolina, USA
6. American Chemistry Council, Arlington, Virginia, USA
7. University of California Berkeley, Berkeley, California, USA
8. University of Washington, Seattle, Washington, USA
9. University of Texas, Houston, Texas, USA
10. University of Arizona, Tucson, Arizona, USA
11. U.S. Environmental Protection Agency, Las Vegas, Nevada, USA
12. Emory University, Atlanta, Georgia, USA