Endoscopy, Table of Contents Endoscopy 1991; 23(4): 240DOI: 10.1055/s-2007-1010669 Letters to the Editor © Georg Thieme Verlag KG Stuttgart · New York Author's Reply M. D. Noar Department of Gastroenterology, St. Joseph Hospital, Franklin Square Hospital, Baltimore, MD, USA Recommend Article Abstract PDF Download Buy Article See also: Teaching by Endoscopy SimulationEndoscopy 1991; 23(04): 239-239DOI: 10.1055/s-2007-1010668 See also Teaching by Endoscopy Simulation PDF (95 kb)