1 Division of Gastroenterology, Department of Medicine, Northwestern University, Chicago, Illinois, USA.
2 Division of Gastroenterology, Department of Medicine, University of Colorado, Aurora, Colorado, USA.
3 Digestive Disease Consultants, Jacksonville, Florida, USA.
4 Division of Gastroenterology, Department of Medicine, University of Pennsylvania, Penn Presbyterian Medical Center, Philadelphia, Pennsylvania, USA.
5 Division of Public Health, Infectious Diseases and Occupational Medicine, Mayo Clinic, Rochester, Minnesota, USA.
6 CentraCare, Interventional Endoscopy Program, St Cloud Hospital, St Cloud, Minnesota, USA.
7 Division of Gastroenterology and Hepatology, NYU Grossman School of Medicine, New York, New York, USA.
8 Division of Gastroenterology and Hepatology, Medical University of South Carolina, Charleston, South Carolina, USA.
9 Division of Gastroenterology, Department of Medicine, Zuckerberg San Francisco General Hospital and University of San Francisco, San Francisco, California, USA.