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Copyright © 2010 The Korean Society of Gastroenterology, the Korean Society of Gastrointestinal Endoscopy, the Korean Society of Neurogastroenterology and Motility, Korean College of Helicobacter and Upper Gastrointestinal Research, the Korean Association for the Study of Intestinal Diseases, Korean Association for the Study of the Liver and Korean Society of Pancreatobiliary Diseases