[1] Virginia Commonwealth Univ, Gastroenterol Hepatol Nutr, Richmond, VA 23284 USA
[2] NIH, Pathol Lab, Bethesda, MD 20892 USA
[3] Univ Pittsburgh, Stat, Pittsburgh, PA USA
[4] Univ Calif San Francisco, Gastroenterol, San Francisco, CA 94143 USA
[5] NIH, Liver Sect, Bldg 10, Bethesda, MD 20892 USA
[6] Univ Hlth Network, Ctr Liver Dis, Toronto, ON, Canada
[7] Massachusetts Gen Hosp, Gastroenterol, Boston, MA 02114 USA
[8] UT Southwestern, Gastroenterol, Dallas, TX USA
[9] Washington Univ, Sch Med, Gastroenterol, St Louis, MO USA