[1] St Louis Vet Adm VA, St Louis, MO USA
[2] St Louis Univ, Sch Med, Dept Gastroenterol & Hepatol, St Louis, MO 63141 USA
[3] Michael E DeBakey VA Med Ctr, Houston, TX USA
[4] Baylor Coll Med, Dept Med, Div Gastroenterol, Houston, TX 77030 USA
[5] Greater Los Angeles VA Healthcare Syst, Dept Med & Hlth Serv Res, Los Angeles, CA USA
[6] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Los Angeles, CA 90095 USA
[7] Washington Univ, Sch Med, St Louis, MO USA
[8] Virginia Commonwealth Univ, Med Ctr, Dept Internal Med, Div Gastroenterol Hepatol & Nutr, Richmond, VA USA
[9] Univ Washington, Sch Med, VA Puget Sound Hlth Care Syst, Seattle, WA USA
[10] Univ Calif San Francisco, Vet Affairs Med Ctr, San Francisco, CA 94143 USA
[11] Univ Calif San Francisco, Dept Med, San Francisco, CA 94143 USA
[12] Univ Miami, Sch Med, Div Gastroenterol & Hepatol, Miami, FL USA
[13] Stanford Univ, Med Ctr, Stanford, CA 94305 USA
[14] Newton Wellesley Hosp, Dept Med, Newton, MA USA
[15] VA San Diego Healthcare Syst, Dept Med, San Diego, CA USA
[16] Univ Calif San Diego, San Diego, CA 92103 USA
[17] Univ Calif Los Angeles, David Geffen Sch Med, UCLA Dumont Liver Transplant Ctr, Los Angeles, CA 90095 USA