1. Agency for Toxic Substances and Disease Registry, Region 5, Chicago, IL, USA
2. U.S. Environmental Protection Agency, Region 5, Chicago, IL, USA
3. Department of Psychology, San Francisco State University, San Francisco, CA, USA
4. Department of Psychology, Colorado State University, Fort Collins, CO, USA
5. Louvain Centre for Toxicology and Applied Pharmacology, Université Catholique de Louvain, Brussels, Belgium
6. U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Research Triangle Park, NC, USA