[1] Brigham & Womens Hosp, Div Gastroenterol Hepatol & Endoscopy, 75 Francis St, Boston, MA 02115 USA
[2] Harvard Med Sch, Boston, MA USA
[3] NIDDK, Div Digest Dis & Nutr, NIH, Bethesda, MD USA
[4] Osaka Prefectural Hosp Org, Dept Canc Survey, Osaka Int Canc Inst, Osaka, Japan
[5] Osaka Prefectural Hosp Org, Dept Gastrointestinal Oncol, Osaka Int Canc Inst, Osaka, Japan
[6] Massachusetts Gen Hosp, Dept Gastroenterol, Boston, MA 02114 USA
[7] Johns Hopkins Univ, Div Gastroenterol, Sch Med, Baltimore, MD USA
[8] Univ Calif Irvine Hlth, Comprehens Digest Dis Ctr, Dept Gastroenterol & Hepatol, Orange, CA USA
[9] Mayo Clin, Dept Gastroenterol & Hepatol, Rochester, MN USA
[10] Indiana Univ, Div Gastroenterol, Hlth Med Ctr, Indianapolis, IN 46204 USA
[11] Univ Washington, Dept Med, Seattle, WA USA
[12] Univ Pittsburgh, Dept Med, Pittsburgh, PA USA
[13] Univ Pittsburgh, Med Ctr, Div Gastroenterol Hepatol & Nutr, Pittsburgh, PA USA
[14] Stanford Univ, Dept Med, Sch Med, Stanford, CA 94305 USA
[15] Univ Pittsburgh, Med Ctr, Dept Pathol, Sewickley, PA USA
[16] Cleveland Clin, Dept Gastroenterol, Cleveland, OH 44106 USA
[17] Mayo Clin Florida, Dept Gastroenterol & Hepatol, Jacksonville, FL USA
[18] Univ Colorado, Div Gastroenterol & Hepatol, Anschutz Med Campus, Aurora, CO USA
[19] Univ Chicago, Sch Med, Dept Med, Comprehens Canc Ctr, Chicago, IL 60637 USA