Ki-Tae Kim1, Kwang-Dong Choi2, Jae-Hwan Choi3. 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, 626-770, Korea. 2. Department of Neurology, Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, 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, 626-770, Korea. rachelbolan@hanmail.net.