1 Center for Advanced Therapeutic Endoscopy, Division of Gastroenterology, Hepatology & Nutrition, Allegheny Health Network, Allegheny Center for Digestive Health, Pittsburgh, Pennsylvania.
2 Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at UCLA, Los Angeles, California.
3 Division of Gastroenterology and Hepatology, The University of New Mexico School of Medicine, Albuquerque, New Mexico.
4 Department of Pathology, The University of New Mexico School of Medicine, Albuquerque, New Mexico.
5 Division of Gastroenterology and Hepatology, The University of New Mexico School of Medicine, Albuquerque, New Mexico, USA.