1 Department of Gastroenterology and Hepatology, Mayo Clinic, Scottsdale, Arizona, USA.
2 Division of Gastroenterology, Department of Internal Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts, USA.
3 Department of Gastroenterology, Interventional Endoscopy Services, California Pacific Medical Center, San Francisco, California, USA.
4 Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA.
5 Department of Gastroenterology, Hepatology & Nutrition, Cleveland Clinic, Cleveland, Ohio, USA.
6 Department of Gastroenterology Hepatology and Nutrition, Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
7 Division of Gastroenterology and Hepatology, Stony Brook Medicine, Stony Brook, New York, USA.
8 Division of Gastroenterology and Hepatology, University of Virginia Health Systems, Charlottesville, Virginia, USA.
9 Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital, Boston, Massachusetts, USA.
10 Division of Gastroenterology, Mount Sinai Hospital, New York, New York, USA.
11 Division of Digestive Diseases and Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.
12 Division of Digestive Diseases, Department of Internal Medicine, Rush University Medical Center, Chicago, Illinois, USA.
13 Division of Gastroenterology and Hepatology, University of Tennessee Health Sciences Center, Memphis, Tennessee, USA.
14 Department of Gastroenterology, Baylor Scott & White Health, Lakeway, Texas, USA.
15 Department of Gastroenterology, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
16 Department of Digestive and Liver Diseases, New York-Presbyterian Medical Center/Columbia University Medical Center, New York, New York, USA.
17 Division of Gastroenterology, Hepatology and Nutrition, University of Minnesota, Minneapolis, Minnesota, USA.
18 Department of Gastroenterology, Zucker School of Medicine at Hofstra/Northwell, Long Island Jewish Medical Center, New Hyde Park, New York, USA.
19 Division of Gastroenterology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, USA.
20 Division of Gastroenterology, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts, USA.