1. Veterans Affairs Western New York Healthcare System, University at Buffalo , New York, New York, USA
2. Gastroenterology Division, Cleveland Clinic , Ohio, USA
3. Gastroenterology and Hepatology, Chevy Chase Clinical Research , Chevy Chase, Maryland, USA
4. Infectious Diseases Division, Massachusetts General Hospital , Boston, Massachusetts, USA
5. Department of Microbiology and Infectious Diseases, Cumming School of Medicine, University of Calgary , Alberta , Canada
6. Section of Infectious Diseases and International Medicine, Department of Internal Medicine, Beaumont Royal Oak , Royal Oak, Michigan, USA
7. Departments of Internal Medicine and Foundational Medical Studies, William Beaumont School of Medicine, Oakland University , Rochester, Michigan, USA
8. Division of Gastroenterology and Hepatology, Mayo Clinic , Rochester, Minnesota, USA
9. Division of Infectious Diseases, Department of Pathology and Laboratory Medicine, Emory University , Atlanta, Georgia, USA
10. Clinical Development, Seres Therapeutics , Cambridge, Massachusetts, USA
11. Division of Infectious Diseases, University of California, Davis Health , Sacramento, California, USA
12. Division of Digestive Disease, Yale University School of Medicine , New Haven, Connecticut, USA
13. Division of Gastroenterology, Yale University and PACT-Gastroenterology Center , Hamden, Connecticut, USA
14. Vanguard Gastroenterology , New York, New York, USA
15. Borland-Groover Clinic, P.A. , Jacksonville, Florida, USA
16. Mercury Street Medical , Butte, Montana, USA
17. Department of Microbiology and Infectious Diseases, Island Medical Program, University of British Columbia and University of Victoria , British Columbia , Canada