1. Department of Senior Healthcare, BK21 Plus Program, Graduate School, Eulji University, Daejeon, Korea.
2. Division of Gastroenterology, Department of Internal Medicine, Eulji University Eulji Hospital, Seoul, Korea.
3. Department of Biomedical Laboratory Science, College of Health Sciences, Eulji University, Seongnam, Korea.
4. Department of Laboratory Medicine, Seongnam Central Hospital, Seongnam, Korea.