1 Division of Medical Communications and Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
2 Harvard Graduate School of Education, Cambridge, MA, USA.
3 Department of Pathology, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA.
4 Department of Radiology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
5 Office of Educational Quality Improvement, Harvard Medical School, Boston, MA, USA.
6 Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
7 Duke University School of Medicine, Durham, NC, USA.