1. Division of Endocrinology & Metabolism, Department of Internal Medicine Keimyung University School of Medicine Daegu South Korea
2. Department of Pathology Keimyung University School of Medicine Daegu South Korea
3. Division of Gastrointestinal Surgery, Department of Surgery Keimyung University School of Medicine Daegu South Korea
4. Division of Gastroenterology & Hepatology, Department of Internal Medicine Keimyung University School of Medicine Daegu South Korea
5. Department of Family Medicine Keimyung University School of Medicine Daegu South Korea