1. National Center for Environmental Assessment, and
2. Office of Children’s Health Protection, U.S. Environmental Protection Agency (EPA), Washington, DC, USA
3. National Health and Environmental Effects Research Laboratory, U.S. EPA, Research Triangle Park, North Carolina, USA
4. Office of Pollution Prevention and Toxics, U.S. EPA, Washington, DC, USA
5. U.S. EPA, Washington, DC, USA (Retired)