1. Department of Medical Sciences, Graduate School of Medicine, Korea University, 80, Guro-dong, Guro-gu, Seoul 152703, South Korea
2. Department of Healthcare Information Technology, Inje University, 197 Inje-Ro, Gimhae 50834, South Korea
3. Institute for Digital Antiaging and Healthcare, Inje University, Gimhae 50834, Republic of Korea
4. Department of Neurosurgery, Guro Hospital, College of Medicine, Korea University, 80, Guro-dong, Guro-gu, Seoul 152-703, South Korea