1. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
2. VA Loma Linda Healthcare System, Loma Linda, CA 92357
3. Department of Otolaryngology & Head and Neck Surgery, Loma Linda University School of Medicine, Loma Linda, CA 92350
4. Department of Otolaryngology – Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287
5. Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD 21287
6. Department of Cognitive Science, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD 21218