1. Department of Neurology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
2. Department of Neurology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
3. Department of Neurology, Inje University College of Medicine, Ilsan-Paik Hospital, Goyang, Republic of Korea
4. Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea