Acharya, D Hargreaves
Kate Gilbert Udall
American College of Physicians.
Elaine Fantle Shimberg
Pacheco, Paulo M.D.
Carol Ann Rinzler
Unknown Author
Anthony Bassler
Karin Cadwell
Barbara E. Wendland
David Utley
David S. Utley
M. Michael Wolfe
National Digestive Diseases Information Clearinghouse (U.S.)
Tom Smith
American Gastroenterological Association
Keith C. Meyer
Jordan Rubin
Jonathan V. Wright