1. The Liver Study Unit, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, Nebraska
2. Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska
3. Departmentof Internal Medicine, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
4. Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska
5. Pathology and Microbiology; College of Medicine; University of Nebraska Medical Center, Omaha, Nebraska
6. The Center for Environmental Toxicology; College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska
7. Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota