1. Department of Nuclear Medicine, Pusan National University Hospital, Busan, Korea
2. Department of Neurosurgery, Pusan National University Yang-san Hospital, Yang-san, Korea
3. Electron Microscope Laboratory, Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
4. Department of Physics, Pukyong National University, Busan, Korea
5. Department of Radiation Oncology, Pusan National University, Busan, Korea
6. Department of Radiology, Pusan National University Yang-san Hospital, Yangsan, Korea
7. Department of Nuclear Medicine, Pusan National University Yang-san Hospital, Yang-san, Korea
8. Department of Microbiology, Pukyong National University, Busan, Korea