1. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
2. Department of Neurology, Mayo Clinic, Rochester, MN, USA
3. Department of Communication Sciences and Disorders, Northeastern University, Boston, MA, USA
4. Department of Cognitive Science, Johns Hopkins University, Baltimore, MD, USA
5. Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, USA