1. Division of Gastroenterology; University of California San Diego; La Jolla CA USA
2. Gastroenterology Unit; Amiens University and Hospital; Université de Picardie Jules Verne; Amiens France
3. Department of Internal Medicine; University of California San Diego; La Jolla CA USA
4. Department of Library Services; Mayo Clinic; Rochester MN USA
5. Division of Colon and Rectal Surgery; Department of Surgery; University of California San Diego; La Jolla CA USA
6. Division of Biomedical Informatics; University of California San Diego; La Jolla CA USA