1. Division of Neurooncology, Department of Neurosurgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea.
2. Department of Neurosurgery, Dong-A University Medical Center, Dong-A University College of Medicine, Busan, Korea.
3. Department of Obstetrics and Gynecology, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea.