1. Biomedical Advanced Research and Development Authority, Department of Health and Human Services, Washington, DC, USA
2. Tunnell Government Services, Bethesda, Maryland, USA
3. Division of Radioprotection, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Bethesda, Maryland, USA
4. Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA