1 Department of Neurology, Parkinson Center, Ajou University School of Medicine, 164, Worldcup-ro, Songjae Hall, Suwon-si, Kyunggi-do, 16499, Republic of Korea.
2 Department of Neurology, Parkinson Center, Ajou University School of Medicine, 164, Worldcup-ro, Songjae Hall, Suwon-si, Kyunggi-do, 16499, Republic of Korea. jhyoon@ajou.ac.kr.