1 Department of Gastroenterology, Kaiser Permanente, Los Angeles Medical Center, Los Angeles, California, USA.
2 Division of Gastroenterology, Kaiser Permanente Medical Center, Walnut Creek, California, USA.
3 Department of Medicine, Division of Gastroenterology, University of Washington, Seattle, Washington, USA.
4 Division of Gastroenterology, Department of Medicine, University of Pennsylvania, Penn Presbyterian Medical Center, Philadelphia, Pennsylvania, USA.
5 Division of Gastroenterology, Kaiser Permanente and Division of Medicine, University of Washington, Seattle, Washington, USA.
6 The Joint Commission, Oakbrook Terrace, Illinois, USA.
7 Ambulatory Surgery Center Association, Alexandria, Virginia, USA.
8 Division of Gastroenterology, Department of Medicine, Zuckerberg San Francisco General Hospital and University of San Francisco, San Francisco, California, USA.