1 Division of Gastroenterology, Department of Medicine, Duke University Medical Center, Durham, North Carolina; Department of Medicine and VA Cooperative Studies Program Epidemiology Center-Durham, Durham VA Health Care System, Durham, North Carolina.
2 Division of Liver Diseases, Icahn School of Medicine at Mount Sinai, New York, New York; Gastroenterology Section, Medical Subspecialties, James J. Peters VA Medical Center, Bronx, New York.
3 Gastroenterology Section, Medical Service, VA Long Beach Healthcare System, Long Beach, California; Gastroenterology Section, Department of Medicine, University of California, Irvine, California.
4 Department of Laboratory Medicine, Yale School of Medicine, New Haven, Connecticut; Pathology and Laboratory Medicine, VA CT Healthcare System, West Haven, Connecticut.