1. Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul, Korea.
2. Department of Biochemistry, Soonchunhyang University College of Medicine, Cheonan, Korea.
3. Department of Pathology, Soonchunhyang University College of Medicine, Cheonan, Korea.
4. Department of Surgery, Soonchunhyang University College of Medicine, Cheonan, Korea.