1. Center for Aphasia Research and Rehabilitation, Georgetown University Medical Center, Washington, DC, USA
2. Department of Physical Medicine and Rehabilitation, Johns Hopkins University, Baltimore, MD, USA
3. Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
4. Department of Otolaryngology—Head and Neck Surgery, Johns Hopkins University, Baltimore, MD, USA
5. Department of Radiology, Johns Hopkins University, Baltimore, MD, USA