[1] Chonbuk Natl Univ, Dept Neurol, Sch Med, 20 Geonji Ro, Jeonju 561712, South Korea
[2] Chonbuk Natl Univ, Res Inst Clin Med, Biomed Res Inst, Chonbuk Natl Univ Hosp, Jeonju, South Korea
[3] Seoul Natl Univ, Coll Med, Dept Neurol, Seoul, South Korea
[4] Seoul Natl Univ, Bundang Hosp, Clin Neurosci Ctr, Dept Neurol,Dizziness Ctr, Seoul, South Korea
[5] Ludwig Maximilians Univ Munchen, Dept Neurol, Munich, Germany
[6] Ludwig Maximilians Univ Munchen, German Ctr Vertigo & Balance Disorders IFBLMU, Munich, Germany
[7] Munich Cluster Syst Neurol SyNergy, Munich, Germany