[1] Mayo Clin & Mayo Fdn, Coll Med, Div Gastroenterol & Hepatol, Rochester, MN 55905 USA
[2] Univ Bologna, Inst Clin Med & Terapia Med, Bologna, Italy
[3] Univ Vermont, Dept Med, Burlington, VT USA
[4] Johannes Gutenberg Univ Mainz, Med Klin & Poliklin, D-6500 Mainz, Germany
[5] Hannover Med Sch, Dept Gastroenterol & Hepatol, Hannover, Germany
[6] Kings Coll London, Sch Med & Dent, Inst Liver Studies, London SE5 9PJ, England
[7] Jikei Univ, Sch Med, Dept Int Med 1, Tokyo, Japan
[8] Univ Calif Los Angeles, Cedars Sinai Med Ctr, David Geffen Sch Med, Dept Hepatol, Los Angeles, CA 90048 USA