1. Health Screening and Promotion Center, Konyang University Hospital, Daejeon, Korea
2. Department of Gastroenterology, College of Medicine, Konyang University, Daejeon, Korea
3. Department of Gastroenterology, CHA University Ilsan Medical Center, Ilsan, Korea
4. Department of Pathology, College of Medicine, Konyang University, Daejeon, Korea
5. Department of Biomedical Informatics, College of Medicine, Konyang University, Daejeon, Korea