Internal Medicine Specialist
Director , H+Gastrointestinal Disease Hospital
Head, Gastrointestinal Disease Center / Chief, Department of Gastroenterolo H+Yangji Hospital
Head, Department of Internal Medicine, Anyang Sam Hospital
Chief, Department of Gastroenterology, Seoul Red Cross Hospital
MD, Dongguk University Gyeongju Hospital
Professor, Department of Gastroenterology, Ulsan University Hospital