1. Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland.
2. In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia.
3. Department of Biochemistry, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia.
4. School of Pharmaceutical Sciences, The University of Shizuoka, Shizuoka, Japan.
5. School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Aberdeen, United Kingdom.