Affiliation: | 1. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Gastric Cancer Center, Kyungpook National University Medical Center, Kyungpook National University School of Medicine, 474 Hakjeongdong, Buk-gu, Daegu, South Korea 2. Department of Internal Medicine, Keimyung University College of Medicine, Daegu, South Korea 3. Department of Internal Medicine, Fatima Hospital, Daegu, South Korea 4. Department of Internal Medicine, Daegu Catholic University School of Medicine, Daegu, South Korea 5. Department of Internal Medicine, Youngnam University School of Medicine, Daegu, South Korea 6. Department of Internal Medicine, Dongkuk University School of Medicine, Gyeongju, South Korea
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