1. From the Department of Neurology (K.-T.K., B.-J.K.), Korea University Medical Center; Department of Otorhinolaryngology-Head and Neck Surgery (E.P.), Korea University College of Medicine; Korea University Medical Center (S.-U.L.); Department of Radiology (B.K.), Korea University Anam Hospital; BK21 FOUR Program in Learning Health Systems (B.-J.K.), Korea University; Dizziness Center (J.-S.K.), Clinical Neuroscience Center, Seoul National University Bundang Hospital; and Department of Neurology (J.-S...