1. Department of Neurosurgery, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
2. Department of Anatomic Pathology, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
3. Department of Neurosurgery, Kosin University College of Medicine, Busan, Korea.
4. Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA.