1. Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
2. Division of Gastroenterology, Hepatology, and Nutrition, University of Pittsburgh, Pittsburgh, PA
3. Penn State Health, Pennsylvania State University, Hershey, PA
4. Department of Pathology, University of Pittsburgh, Pittsburgh, PA
5. Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD