1 From the Department of Neurology (H.-W.N., S.-U.L., S.Y.), Korea University Medical Center; Department of Neurology (D.Y.), Kyung Hee University Hospital; Dizziness Center, Clinical Neurosience Center, and Department of Neurology (J.-Y.C., J.-S.K.), Seoul National University Bundang Hospital, Seongnam; Department of Neurology (D.Y., S.-U.L., J.-Y.C., J.-S.K.), Seoul National University College of Medicine, Seoul; and Department of Neurology (S.Y.), Korea University College of Medicine, Seoul, South Korea.
2 From the Department of Neurology (H.-W.N., S.-U.L., S.Y.), Korea University Medical Center; Department of Neurology (D.Y.), Kyung Hee University Hospital; Dizziness Center, Clinical Neurosience Center, and Department of Neurology (J.-Y.C., J.-S.K.), Seoul National University Bundang Hospital, Seongnam; Department of Neurology (D.Y., S.-U.L., J.-Y.C., J.-S.K.), Seoul National University College of Medicine, Seoul; and Department of Neurology (S.Y.), Korea University College of Medicine, Seoul, South Korea. sulee716@gmail.com.