[1] VA White River Junction, Gastroenterol, White River Jct, VT USA
[2] Univ N Carolina, Sch Med, Div Gastroenterol & Hepatol, Chapel Hill, NC 27515 USA
[3] Penn State Hershey Med Ctr, Div Gastroenterol & Hepatol, Hershey, PA USA
[4] Florida Hosp, Ctr Intervent Endoscopy, Orlando, FL USA
[5] Med Univ South Carolina, Div Gastroenterol & Hepatol, Charleston, SC 29425 USA
[6] Johns Hopkins Univ Hosp, Div Gastroenterol & Hepatol, Baltimore, MD 21287 USA
[7] Sibley Mem Hosp, Div Gastroenterol & Hepatol, Washington, DC USA
[8] Dartmouth Hitchcock Med Ctr, Dept Gastroenterol & Hepatol, Lebanon, NH 03766 USA
[9] Yale New Haven Med Ctr, Sect Digest Dis, 20 York St, New Haven, CT 06504 USA
[10] John D Dingell Vet Affairs Med Ctr, Div Gastroenterol, Detroit, MI USA
[11] Wayne State Univ, Detroit, MI USA
[12] Univ Montreal, Med Ctr, CHUM, Div Gastroenterol, Montreal, PQ, Canada
[13] Res Ctr CRCHUM, Montreal, PQ, Canada
[14] Univ Kansas, Med Ctr, Div Gastroenterol Hepatol & Motil, Kansas City, KS 66103 USA
[15] Univ S Florida, James A Haley VA, Div Gastroenterol, Tampa, FL USA
[16] Univ Michigan, Div Gastroenterol & Hepatol, Ann Arbor, MI 48109 USA
[17] Hosp Clin Barcelona, Gastroenterol Dept, Barcelona, Spain
[18] Dartmouth Inst, Lebanon, NH USA
[19] Indiana Univ Sch Med, Indianapolis, IN 46202 USA
[20] Beth Israel Deaconess Med Ctr, Boston, MA 02215 USA