1. Department of Internal Medicine, Gachon University of Medicine and Science, Gil Hospital, Incheon, Korea.
2. Department of Neurosurgery, Gachon University of Medicine and Science, Gil Hospital, Incheon, Korea.
3. Department of Pathology, Gachon University of Medicine and Science, Gil Hospital, Incheon, Korea.
4. Department of Laboratory Medicine, Gachon University of Medicine and Science, Gil Hospital, Incheon, Korea.