1. Division of Radioprotection, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, U.S.A.;
2. Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD, U.S.A.;
3. Tech Micro Services, Bethesda, MD, U.S.A.