1. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland
2. Neuro-Medical Scientific Center, Department of Neurology, Taichung Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taichung, Taiwan
3. Department of Medicine, Tzu Chi University, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
4. Laboratory of Vestibular NeuroAdaptation, Department of Otolaryngology–Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
5. Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, Maryland