1. Division of Community Health Services; Liver Disease and Hepatitis Program; Alaska Native Tribal Health Consortium; Anchorage AK USA
2. Department of Gastroenterology, Hepatology, and Endocrinology; Medical School of Hannover; Hannover Germany
3. Arthritis and Clinical Immunology; Oklahoma Medical Research Foundation; Oklahoma OK USA
4. Department of Medicine and Pathology; University of Oklahoma Health Sciences Center; Oklahoma OK USA