1. Division of Radiation Health, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
2. Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
3. Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland.
4. Department of Oncology, Georgetown University Medical Center, Washington, District of Columbia.
5. Surgical Service, Central Arkansas Veterans Healthcare System, Little Rock, Arkansas.