1 Department of Neurology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, South Korea.
2 Department of Pediatrics, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, South Korea.
3 Department of Neurology, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, South Korea. neurojspark@gmail.com.