1 Department of Neurology, Inje University Ilsan Paik Hospital, Inje University College of Medicine, Goyang, South Korea.
2 Department of Neurology, Korea University Guro Hospital, Seoul, South Korea.
3 Research Institute for Life Science, GW Vitek, Inc., Seoul, South Korea.
4 Department of Neurology, Cerebrovascular Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, South Korea.