[1] Amsterdam Univ Med Ctr, Dept Gastroenterol, Amsterdam, Netherlands
[2] Natl Jewish Hlth, Dept Med, Div Gastroenterol, Denver, CO USA
[3] Northwestern Univ, Dept Med, Feinberg Sch Med, Div Gastroenterol & Hepatol, Chicago, IL 60611 USA
[4] Flinders Univ S Australia, Coll Med & Publ Hlth, Adelaide, SA, Australia
[5] Natl Ctr Global Hlth & Med, Div Gastroenterol & Hepatol, Tokyo, Japan
[6] Univ Calif San Diego, Ctr Esophageal Dis, Div Gastroenterol & Hepatol, La Jolla, CA 92093 USA
[7] Univ S Florida, Coll Med, Joy McCann Culverhouse Ctr Esophageal Dis, Tampa, FL 33620 USA
[8] Case Western Reserve Univ, Metrohlth Med Syst, Div Gastroenterol & Hepatol, Esophageal & Swallowing Ctr, Cleveland, OH 44106 USA