Teresa Lever, University of Missouri (IMAGE) University of Missouri-Columbia Caption University of Missouri researchers led by otolaryngology scientist Teresa Lever, Ph.D., discovered that aging is a key factor in the development of dysphagia. Their findings could lead to new treatments for the swallowing disorder. Credit Justin Kelley/University of Missouri Health System Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.