Department of Internal Medicine, Division of Gastroenterology-Hepatology, Henry Ford Hospital, Detroit, MI, USA. Electronic address: sgordon3@hfhs.org. Gastroenterology and Hepatology Research Group, Duke Clinical Research Institute, Durham, NC, USA. Yale Liver Center, Yale University School of Medicine, New Haven, CT, USA. Center for Hepatitis C, Atlanta Medical Center, Atlanta, GA, USA. University of Virginia, Charlottesville, VA, USA. Columbia Memorial Hospital, Hudson, NY, USA. Strong Memorial Hospital/University of Rochester, Rochester, NY, USA. Austin Hepatitis Center, Austin, TX, USA. UNC Liver Center, University of North Carolina, Chapel Hill, NC, USA. University of Florida, Division of Gastroenterology, Hepatology and Nutrition, Gainesville, FL, USA. University of Pennsylvania, Philadelphia, PA, USA. Electronic address: rajender.reddy@uphs.upenn.edu.