1. Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
2. Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul National University, Seoul, Korea.
3. School of Chemical and Biological Engineering, Seoul National University, Seoul, Korea.
4. Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
5. Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul, Korea.
6. National Traffic Injury Rehabilitation Hospital, Yangpyeong, Korea.
7. Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, Korea.