Drs. S. Kim and H.J. Kim report no disclosures relevant to the manuscript. Dr. J.Y. Choi serves as an associate editor of the Journal of Clinical Neurology. Dr. J.S. Kim serves as an associate editor of Frontiers in Neuro-otology and on the editorial boards of Frontiers in Neuro-ophthalmology, Journal of Neuro-ophthalmology, Journal of Vestibular Research, and Clinical and Translational Neuroscience.

This study followed the tenets of the Declaration of Helsinki and was performed according to the guidelines of the Institutional Review Board of Seoul National University Bundang Hospital (B-2407-911-701).