1. Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University (SKKU), Suwon 16419, Korea
2. Department of Anatomy, Yonsei University College of Medicine, Seoul 03722, Korea
3. Department of Neurosurgery, Yonsei University College of Medicine, Seoul 03722, Korea
4. Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
5. Brain Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea