1. Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland;
2. Department of Veterinary and Biomedical Sciences and The Center for Molecular Toxicology and Carcinogenesis, The Pennsylvania State University, University Park, Pennsylvania;
3. Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland;
4. Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, DC;
5. Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland;
6. Hepatology Research Group, Department of Clinical Research, University of Bern, 3010 Bern, Switzerland