1. Liver Diseases Branch National Institute of Diabetes and Digestive and Kidney Diseases National Institutes of Health Bethesda MD USA
2. Laboratory of Pathology National Cancer InstituteNational Institutes of Health Bethesda MD USA
3. Clinical Center National Institutes of Health Bethesda MD USA
4. Division of Gastroenterology and Hepatology Department of Medicine Stanford University School of Medicine Stanford CA USA
5. Liver Disease Research Branch National Institute of Diabetes and Digestive and Kidney Diseases National Institutes of Health Bethesda MD USA