1. Department of Pathology; Seoul National University Hospital; Seoul Korea
2. Department of Pathology; Seoul National University College of Medicine; Seoul Korea
3. Department of Neurosurgery; Seoul National University Hospital; Seoul Korea
4. Department of Internal Medicine; Seoul National University Hospital; Seoul Korea
5. Department of Radiology; Seoul National University Hospital; Seoul Korea
6. Neuroscience Institute; Seoul National University College of Medicine; Seoul Korea