1. Division of Cerebrovascular Disease and Department of Neurosurgery, Samsung Changwon Hospital, Sungkyunkwan University of School of Medicine, Changwon 51353, Republic of Korea
2. Department of Medicine, Sungkyunkwan University of School of Medicine, Suwon 16419, Republic of Korea
3. Division of Hematology and Medical Oncology, Department of Internal Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon 51353, Republic of Korea
4. Division of Neuro-Oncology and Department of Neurosurgery, Samsung Changwon Hospital, Sungkyunkwan University of School of Medicine, Changwon 51353, Republic of Korea