[1] Oregon Hlth & Sci Univ, Div Gastroenterol, Portland, OR 97329 USA
[2] Oregon Hlth & Sci Univ, Dept Med Informat & Clin Epidemiol, Portland, OR 97329 USA
[3] Technion Israel Inst Technol, Rappaport Fac Med, Dept Gastroenterol, GI Outcomes Unit, Haifa, Israel