| Affiliation: | (1) Department of Neurology, Korea University College of Medicine, Seoul, Korea;(2) Department of Neurology, Soonchunhyang University College of Medicine, Seoul, Korea;(3) Department of Neurology and Clinical Epidemiology, Soonchunhyang University College of Medicine, Cheonan, Korea;(4) Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea;(5) Department of Neurology, Stanford University Medical Center, Stanford, CA, USA;(6) Department of Internal Medicine, Dong-A University College of Medicine, Busan, Korea;(7) Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea;(8) Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul, 135-710, Korea |
