1. Department of Neurology, Catholic Kwandong University College of Medicine, International St. Mary's Hospital, Incheon, Korea.
2. Department of Neurology, Ewha Womans University School of Medicine, Ewha Womans University Mokdong Hospital, Seoul, Korea.
3. Department of Pathology, Ewha Womans University School of Medicine, Ewha Womans University Mokdong Hospital, Seoul, Korea.
4. Department of Neurology and Neurocognitive Center, Myongji Hospital, Goyang, Korea.