[1] Med Univ S Carolina, Ctr Digest Dis, Charleston, SC 29425 USA
[2] Vet Affairs No Calif Hlth Care Syst, Sacramento, CA USA
[3] Univ Calif Davis, Sacramento, CA 95817 USA
[4] Asian Inst Gastroenterol, Hyderabad, Andhra Pradesh, India
[5] Mayo Clin, Div Gastroenterol & Hepatol, Rochester, MN USA
[6] Beth Israel Deaconess Med Ctr, Div Digest Dis, New York, NY 10003 USA
[7] Beth Israel Deaconess Med Ctr, Ctr Digest Hlth, New York, NY 10003 USA
[8] Univ Texas MD Anderson Canc Ctr, Dept Gastroenterol Hepatol & Nutr, Houston, TX 77030 USA
[9] Columbia Univ Coll Phys & Surg, St Lukes Roosevelt Hosp, Div Gastroenterol & Liver Dis, New York, NY 10032 USA