[1] Massachusetts Gen Hosp, Gastrointestinal Unit, Boston, MA 02114 USA
[2] Massachusetts Gen Hosp, Liver Biliary Pancreas Ctr, Boston, MA 02114 USA
[3] Harvard Univ, Sch Med, Dept Med, Boston, MA USA
[4] Univ Miami, Med Ctr, Ctr Liver Dis, Miami, FL 33152 USA
[5] Vet Affairs Med Ctr, Miami, FL 33125 USA
[6] Vet Affairs Med Ctr, Div Gastroenterol, San Francisco, CA 94121 USA
[7] Alton Ochsner Med Fdn & Ochsner Clin, Div Gastroenterol, New Orleans, LA 70121 USA
[8] Thomas Jefferson Univ, Jefferson Med Coll, Div Gastroenterol & Hepatol, Philadelphia, PA 19107 USA
[9] Armed Forces Inst Pathol, Washington, DC 20306 USA
[10] Glaxo Wellcome Inc, Res Triangle Pk, NC 27709 USA