1. Swallowing Systems Core, University of Florida, Gainesville, FL, USA,
2. Department of Speech, Language and Hearing Science, University of Florida, Gainesville, FL, USA,
3. Department of Neurology, University of Florida, Gainesville, FL, USA,
4. Department of Physical Therapy, University of Florida, Gainesville, FL, USA, and
5. Department of Neurology, Neurology Associates, University of Nebraska, Lincoln, NE, USA