1. Department of Internal Medicine, Soonchunhyang University Medical College, Cheonan Hospital, Cheonan, Korea.
2. Department of Pathology, Soonchunhyang University Medical College, Cheonan Hospital, Cheonan, Korea.
3. Department of Biochemistry, Soonchunhyang University Medical College, Cheonan Hospital, Cheonan, Korea.
4. Department of Pediatrics, Soonchunhyang University Medical College, Cheonan Hospital, Cheonan, Korea.