1. Oak Ridge Associated Universities, Oak Ridge, TN, USA;
2. GP Nichols & Company, LLC, Knoxville, TN, USA;
3. International Epidemiology Institute, Rockville, MD, USA;
4. National Council on Radiation Protection and Measurements, Bethesda, MD, USA;
5. Division of Epidemiology Department of Medicine, Vanderbilt Epidemiology Center and Vanderbilt-Ingram Cancer Center, Nashville, TN, USA;
6. U.S. Nuclear Regulatory Commission, Washington, DC, USA