1. Department of Radiology; Seoul National University College of Medicine; Seoul Korea
2. Department of Radiation Applied Life Science; Seoul National University College of Medicine; Seoul Korea
3. Department of Internal Medicine; Cancer Research Institute; Seoul National University College of Medicine; Seoul Korea
4. Department of Neurosurgery; Biomedical Research Institute; Seoul National University College of Medicine; Seoul Korea
5. Department of Pathology; Seoul National University College of Medicine; Seoul Korea
6. Department of Radiation Oncology; Cancer Research Institute; Seoul National University College of Medicine; Seoul Korea