1. Department of Internal Medicine; University of Michigan Medical School; Ann Arbor MI USA
2. Veterans Affairs Ann Arbor Health Care System; Ann Arbor MI USA
3. Drossman Center for the Education and Practice of Biopsychosocial Care and Drossman Gastroenterology; Chapel Hill NC USA
4. Department of Internal Medicine; University of Iowa Hospitals and Clinics; Iowa City IA USA
5. Gillings School of Global Public Health; University of North Carolina; Chapel Hill NC USA
6. UNC Center for Functional GI & Motility Disorders; University of North Carolina; Chapel Hill NC USA
7. International Foundation for Functional Gastrointestinal Disorders; Milwaukee WI USA