1. Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Neurosurgery, Catholic Kwandong University College of Medicine, International St. Mary’s Hospital, Incheon, Korea.
3. Department of Medical Biophysics, University of Toronto, Toronto, Canada, Korea.
4. Department of Electronics Engineering, Sookmyung Women’s University, Seoul, Korea.