1. National Council on Radiation Protection and Measurements, Bethesda, MD, USA
2. Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center and Vanderbilt-Ingram Cancer Center, Nashville, TN, USA
3. EpidStrategies, a Division of ToxStrategies, Cary, NC, USA
4. International Epidemiology Institute, Rockville, MD, USA
5. Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, TN, USA
6. Oak Ridge Associated Universities, Oak Ridge, TN, USA
7. Private Consultant, New York, NY, USA
8. Risk Assessment Corporation, Neeses, SC, USA