[1] Columbia Univ, Med Ctr, Div Liver & Digest Dis, New York, NY 10027 USA
[2] Univ Virginia, Digest Hlth Res Ctr, Charlottesville, VA USA
[3] Univ Virginia, Training Program, Charlottesville, VA USA
[4] Mayo Clin, Div Gastroenterol & Hepatol, Scottsdale, AZ USA
[5] NYU, Sch Med, New York, NY USA
[6] Vet Affairs Med Ctr, San Francisco, CA 94121 USA
[7] Univ Cincinnati, Dept Cellular & Mol Physiol, Cincinnati, OH USA
[8] Stanford Univ, Sch Med, Div Gastroenterol & Hepatol, Stanford, CA 94305 USA
[9] Univ Texas Med Branch, Galveston, TX USA
[10] Gastroenterol Assoc Cent Penn, Hershey, PA USA
[11] Mayo Clin, Rochester, MN USA
[12] Univ Michigan, Ann Arbor, MI 48109 USA