1. Department of Medicine, Washington University School of Medicine, St. Louis, Missouri
2. Hamilton Regional Laboratory Medicine Program, Department of Pathology and Molecular Medicine, McMaster University, Ontario
3. Vancouver Island Health Authority, Victoria, British Columbia
4. Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada
5. Division of Infectious Diseases, Mayo Clinic in Arizona, Phoenix
6. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
7. Division of Gastroenterology, Hepatology and Nutrition, Loyola University Medical Center, Chicago, Illinois
8. Edward Hines Jr. VA Hospital, Illinois