Affiliation: | 1. Department of Biomedical Science, College of Medicine, Catholic University of Korea, Seoul 137‐701, Korea;2. Postech‐Catholic Biomedical Engineering Institute, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul 137‐701, Korea;3. Department of Neurosurgery, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul 137‐701, Korea |