1 Department of Neurology, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Kumo-ro 20, Beomo-ri, Mulgum-eup, Yangsan, Gyeongnam, 50612, South Korea.
2 Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Biomedical Research Institute, Busan, South Korea.
3 Department of Neurology, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Kumo-ro 20, Beomo-ri, Mulgum-eup, Yangsan, Gyeongnam, 50612, South Korea. rachelbolan@hanmail.net.