1. Division of Gastroenterology, Hepatology and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee
2. Institute for Medicine and Public Health, Vanderbilt University Medical Center, Nashville, Tennessee
3. National Foundation of Swallowing Disorders, Carmel, California, US
4. Department of Communication Sciences and Disorders, University of Wisconsin, Wisconsin, USA
5. Department of Surgery, University of Wisconsin, Madison, Wisconsin, USA
6. Division of Otolaryngology, and Wisconsin Surgical Outcomes Research Program, University of Wisconsin, Madison, USA