1. Graduate School of Life Science and Biotechnology, College of Medicine, Korea University, Seoul, Korea
2. Department of Anatomical Pathology, College of Medicine, Korea University, Seoul, Korea
3. Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
4. Catholic Research Institutes of Medical Science Catholic Medical College, Seoul, Korea
5. Graduate School of Life Science and Biotechnology and Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea