1. Laboratory
of Metabolism, Center
for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United
States
2. Department of Food Science
and Nutrition, University of Minnesota,
St. Paul, Minnesota 55108,
United States
3. Radiation Biology
Branch, Center
for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United
States
4. Department of Veterinary
and
Biomedical Sciences and the Center for Molecular Toxicology and Carcinogenesis, The Pennsylvania State University, University Park,
Pennsylvania 16802, United States