Sungkyunkwan University - Department of Neurology, Sungkyunkwan University - Samsung Medical Center, Sungkyunkwan University - Samsung Medical Center, Yonsei University - Department of Preventive Medicine, Sungkyunkwan University - Department of Neurology, Sungkyunkwan University - Department of Neurology, Sungkyunkwan University - Department of Neurology, Sungkyunkwan University - Department of Neurology, Sungkyunkwan University - Department of Neurology, Sungkyunkwan University - Department of Neurology, Sungkyunkwan University - Department of Neurology, Wake Forest University - School of Medicine, VU University Medical Center, University of California, Berkeley - Helen Wills Neuroscience Institute, Sungkyunkwan University - Department of Neurology, University of California, San Francisco (UCSF), Sungkyunkwan University - Department of Neurology and Independent