1. Department of Neurosurgery, Dongguk University College of Medicine, Dongguk University Gyeongju Hospital, Gyeongju, South Korea
2. Department of Neurosurgery, SMG Yeonse Hospital, Changwon, South Korea
3. College of Medicine, Pusan National University, Busan, Korea
4. Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
5. College of Pharmacy, Pusan National University, Busan, South Korea
6. Pusan National University Yangsan Hospital, College of Medicine, Pusan National University, Busan, South Korea
7. Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Korea