1. Department of Neurology (M.D.S., L.K., A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD.
2. Department of Communication Sciences and Disorders, Arnold School of Public Health, University of South Carolina, Columbia (S.N.-N., J.F.).
3. Apex Innovations LLC, Lafayette, LA (B.W., M.B., E.R.).
4. Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine of University of Southern California, Los Angeles (P.D.L.).
5. Department of Neurology, Keck School of Medicine, Los Angeles, CA (P.D.L.).
6. Department of Physical Medicine and Rehabilitation (A.E.H.), Johns Hopkins University School of Medicine, Baltimore, MD.
7. Department of Cognitive Science, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD (A.E.H.).