[1] Univ Washington, Dept Internal Med, Div Gastroenterol, Seattle, WA USA
[2] Brigham & Womens Hosp, Dept Med, Div Genet, Boston, MA USA
[3] Harvard Med Sch, Boston, MA USA
[4] Broad Inst MIT & Harvard, Program Med & Populat Genet, Cambridge, MA USA
[5] Mayo Clin, Dept Gastroenterol & Hepatol, Rochester, MN USA