1. The Esophageal and Swallowing Center, Division of Gastroenterology and Hepatology, MetroHealth Medical Center, Case Western Reserve University, Cleveland, OH, USA
2. Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH, USA
3. Department of Internal Medicine, Case Western Reserve University, MetroHealth Medical Center, Cleveland, OH, USA
4. Center for Health Care Research and Policy, Case Western Reserve University, MetroHealth Medical Center, Cleveland, OH, USA