1. Department of Nuclear Medicine, Dongnam Institute of Radiological & Medical Sciences (DIRAMS), Busan 619-953, Korea.
2. Department of Nuclear Medicine, Kyungpook National University School of Medicine, Kyungpook National University Hospital, Daegu 700-721, Korea.
3. Department of Pathology, Kyungpook National University School of Medicine, Kyungpook National University Hospital, Daegu 700-721, Korea.
4. Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
5. Department of Neurosurgery, Kyungpook National University School of Medicine, Kyungpook National University Hospital, Daegu 700-721, Korea.