aDivision of Gastroenterology and Hepatology, Virginia Commonwealth University Health Center

bDivision of Gastroenterology, Hunter Holmes McGuire VA Medical Center, Richmond, Virginia, USA

cDepartment of Clinical Physiology, Kantipur Dental College and Teaching Hospital, Nepal

dDepartment of Gastroenterology, Hepatology, and Nutrition, Cleveland Clinic Florida, 2950 Cleveland Clinic Blvd, Weston, FL 33331

Correspondence to Shreesh Shrestha, MD, Division of Gastroenterology, Virginia Commonwealth University, 1200 East Broad Street, 14th floor, Box 980341, Richmond, VA 23298, USA. Tel: +1 804 828 4060; e-mail: [email protected]