1 Division of Gastroenterology and Hepatology, Loma Linda University School of Medicine, Loma Linda, California; Gastroenterology Division, Perelman School of Medicine, Philadelphia, Pennsylvania; Center for Endoscopic Innovation, Research and Training, Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania.
2 Gastroenterology Division, Perelman School of Medicine, Philadelphia, Pennsylvania; Center for Endoscopic Innovation, Research and Training, Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania.