1. Laboratory of Signal Transduction, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Research Triangle Park, North Carolina, USA
2. Social and Scientific Systems Inc., Research Triangle Park, North Carolina, USA
3. Molecular Genomics Core Laboratory, NIEHS, NIH, DHHS, Research Triangle Park, North Carolina USA
4. Department of Medicine, and
5. Department of Biochemistry, Duke University Medical Center, Durham, North Carolina, USA