1. Weill Cornell Medical College, MD Program, New York, New York, USA;
2. Division of Gastroenterology and Hepatology, New York-Presbyterian Hospital/Weill Cornell Medicine, New York, New York, USA;
3. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA;
4. Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA;
5. Department of Digestive Diseases, Yale School of Medicine, New Haven, Connecticut, USA;
6. Samuel J. Wood Library, Weill Cornell Medical College, New York, New York, USA.