[1] Univ Washington, Div Gastroenterol, Seattle, WA 98195 USA
[2] VISN 17 PBM, Vet Affairs Heart Texas Hlth Care Network, Temple, TX USA
[3] Vet Affairs Puget Sound Hlth Care Syst, Div Gastroenterol, Seattle, WA USA
[4] Bruce Carter Vet Affairs Med Ctr, Div Hepatol, Miami, FL USA
[5] Vet Affairs Pittsburgh Healthcare Syst, Ctr Hlth Equ Res & Promot, Pittsburgh, PA USA
[6] Univ Pittsburgh, Dept Med, Pittsburgh, PA USA
[7] Univ Pittsburgh, Dept Surg, Pittsburgh, PA USA
[8] VISN 12 PBM, Vet Affairs Great Lakes Hlth Care Syst, Westchester, IL USA