Author information:
(1)Department of Neurology, Seoul Paik Hospital, Inje University College of 
Medicine, Seoul, Korea.
(2)Department of Neurology, College of Medicine, The Catholic University of 
Korea, Seoul, Korea.
(3)Department of Neurology, Korea University Guro Hospital, Korea University 
College of Medicine, Seoul, Korea.
(4)Department of Neurology, Kyung Hee University College of Medicine, Seoul, 
Korea.
(5)Department of Neurology, Busan Paik Hospital, Inje University College of 
Medicine, Busan, Korea.
(6)Department of Neurology, Dong-A University College of Medicine, Busan, Korea.
(7)Department of Neurology and Neuroscience Center, Samsung Medical Center, 
Sungkyunkwan University School of Medicine, Seoul, Korea.
(8)Department of Neurology, Hallym University College of Medicine, Anyang, 
Korea.
(9)Department of Neurology, Yeungnam University College of Medicine, Daegu, 
Korea.
(10)Department of Neurology, Sanggye Paik Hospital, Inje University College of 
Medicine, Seoul, Korea.
(11)Department of Neurology, Severance Hospital, Yonsei University College of 
Medicine, Seoul, Korea.
(12)Department of Neurology, Parkinson/Alzheimer Center, Asan Medical Center, 
University of Ulsan College of Medicine, Seoul, Korea.
(13)Department of Neurology, Seoul National University College of Medicine, 
Seoul National University Bundang Hospital, Seongnam, Korea.
(14)Department of Neurology, Seoul National University Hospital, Seoul National 
University College of Medicine, Seoul, Korea.
(15)Department of Neurology, College of Medicine, Gachon University, Incheon, 
Korea.
(16)Department of Neurology, Korea University Ansan Hospital, Korea University 
College of Medicine, Ansan, Korea.
(17)Department of Neurology, Pusan National University Yangsan Hospital, 
Yangsan, Korea.
(18)Department of Neurology, Seoul Metropolitan Government-Seoul National 
University Boramae Medical Center, College of Medicine, Seoul National 
University, Seoul, Korea.
(19)Department of Neurology, Chungbuk National University School of Medicine, 
Chungbuk National University Hospital, Cheongju, Korea.
(20)Department of Neurology, Ewha Womans University School of Medicine, Ewha 
Womans University Mokdong Hospital, Seoul, Korea.
(21)Department of Neurology, Konkuk University Medical Center, Seoul, Korea.
(22)Department of Neurology, Yonsei University Wonju College of Medicine, Wonju, 
Korea.
(23)Department of Neurology, Bobath Memorial Hospital, Seongnam, Korea.
(24)Department of Neurology, Soonchunhyang University Seoul Hospital, 
Soonchunhyang University School of Medicine, Seoul, Korea.
(25)Department of Neurology, Chungnam National University School of Medicine, 
Chungnam National University Hospital, Daejeon, Korea.
(26)Department of Neurology, Ulsan University Hospital, University of Ulsan 
College of Medicine, Ulsan, Korea.
(27)Department of Neurology, Kangbuk Samsung Hospital, Sungkyunkwan University 
School of Medicine, Seoul, Korea.
(28)Department of Neurology, Keimyung University School of Medicine, Daegu, 
Korea.
(29)Department of Neurology, Soonchunhyang University Gumi Hospital, 
Soonchunhyang University School of Medicine, Gumi, Korea.
(30)Department of Neurology, Hanyang University College of Medicine, Seoul, 
Korea.