1. Department of Neurological Surgery, Inje University Busan Paik Hospital, Busan, South Korea
2. Department of Diagnostic Radiology, Inje University Busan Paik Hospital, Busan, South Korea
3. Department of Neurological Surgery, DaeKoo, Korea
4. Department of Neurological Surgery, ChoonHae Hospital, Busan, Korea
5. Boston University College of Arts and Sciences: Biology, Boston, Massachusetts, United States