1. Department of Internal Medicine, College of Medicine, Inha University, Incheon, Korea.
2. Department of Pathology, College of Medicine, Inha University, Incheon, Korea.
3. Department of Radiology, College of Medicine, Inha University, Incheon, Korea.
4. Department of Internal Medicine, Daesung General Hospital, Incheon, Korea.
5. Department of Neurosuergery, Yonsei University Hospital, Seoul, Korea.