aDivision of Gastroenterology, Department of Medicine, Maimonides Medical Center

bDepartment of Medicine, SUNY Downstate College of Medicine, Brooklyn, New York, USA

Correspondence to Michael G. Kantrowitz, DO, MS, Division of Gastroenterology, Maimonides Medical Center, 4802 10th Avenue, Brooklyn, NY 11219, USA. Tel: +1 718 283 8250; e-mail: [email protected]