1. Oak Ridge National Laboratory, Oak Ridge, TN, USA;
2. U.S. Transuranium and Uranium Registries, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Richland, WA, USA;
3. National Council on Radiation Protection and Measurements, Bethesda, MD, USA;
4. Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center and Vanderbilt-Ingram Cancer Center, Nashville, TN, USA