1. Department of Health and Human Services, Office of the Assistant Secretary for Preparedness and Response, Washington, DC, USA
2. Radiation Research Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, MD, USA
3. Radiation and Nuclear Countermeasures Program, Division of Allergy, Immunology, and Transplantation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA