1. Section on Gastroenterology; Wake Forest University; Winston-Salem NC USA
2. Division of Gastroenterology; University of Michigan; Ann Arbor MI USA
3. Johns Hopkins University Bloomberg School of Public Health; Baltimore MD USA
4. Section of Gastroenterology; Temple University; Philadelphia PA USA
5. Center for Neurogastroenterology; Johns Hopkins Bayview Medical Center; Baltimore MD USA
6. Endocrinology Section; MetroHealth Medical Center; Cleveland OH USA
7. California Pacific Medical Center; San Francisco CA USA
8. Digestive and Liver Health; University of Louisville; Louisville KY USA
9. Division of Gastroenterology; Texas Tech University; El Paso TX USA
10. Division of Gastroenterology; Stanford University; Palo Alto CA USA
11. Division of Gastroenterology and Hepatology; Mayo Clinic; Rochester MN USA
12. National Institute of Diabetes and Digestive and Kidney Diseases; Bethesda MD USA