1. Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
2. Department of Chemical and Biomolecular Engineering, College of Engineering, Yonsei University, Seoul 03722, Republic of Korea
3. Department of Anatomy and Cell Biology, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
4. Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 03080, Republic of Korea