1. Department of Neurology, Kangwon National University College of Medicine, Chuncheon, Korea.
2. Department of Internal Medicine, Kangwon National University College of Medicine, Chuncheon, Korea.
3. Department of Radiology, Kangwon National University College of Medicine, Chuncheon, Korea.
4. Medical Science and Engineering Research Center for Bioreaction to Reactive Oxygen Species, Kangwon National University College of Medicine, Chuncheon, Korea.