[1] Univ Michigan, Med Ctr, Div Gastroenterol, Ann Arbor, MI 48109 USA
[2] Virginia Commonwealth Univ, Div Gastroenterol, Richmond, VA USA
[3] Univ Massachusetts, Med Ctr, Div Gastroenterol, Worcester, MA 01605 USA
[4] New England Res Inst, Watertown, MA 02172 USA
[5] St Louis Univ, Sch Med, Div Gastroenterol & Hepatol, St Louis, MO 63103 USA
[6] Univ Colorado, Sch Med, Sect Hepatol, Div Gastroenterol & Hepatol, Denver, CO 80202 USA
[7] Univ So Calif, Keck Sch Med, Div Gastrointestinal & Liver Dis, Los Angeles, CA USA
[8] Univ Texas, SW Med Ctr, Div Digest & Liver Dis, Dallas, TX USA
[9] Univ Calif Irvine, Div Gastroenterol, Irvine, CA USA
[10] Massachusetts Gen Hosp, Gastrointestinal Unit, Med Serv, Boston, MA 02114 USA
[11] Harvard Univ, Sch Med, Dept Med, Boston, MA 02115 USA
[12] NIDDK, Liver Dis Branch, Div Digest Dis & Nutr, Dept Hlth & Human Serv,NIH, Bethesda, MD USA
[13] Univ Washington, Dept Lab Med, Seattle, WA 98195 USA
[14] Univ Washington, Dept Med, Seattle, WA 98195 USA