1. Baylor Scott and White Medical Center Dallas Texas USA
2. Department of Epidemiology University of Pittsburgh Pittsburgh Pennsylvania USA
3. Johns Hopkins University School of Medicine Baltimore Maryland USA
4. University of California San Francisco California USA
5. Washington University School of Medicine St. Louis Missouri USA
6. Massachusetts General Hospital Boston Massachusetts USA
7. National Cancer Institute Rockville Maryland USA
8. Abbott Diagnostics Abbott Park Illinois USA
9. Toronto Centre for Liver Disease University of Toronto University Health Network Toronto Canada