1. Professor of Medicine, Case Western Reserve University, Director, Division of Gastroenterology and Hepatology, Head, Esophageal and Swallowing Center, MetroHealth Medical Center, 2500 MetroHealth Drive, Cleveland, OH 44109, USA
2. The Esophageal and Swallowing Center, Division of Gastroenterology and Hepatology, MetroHealth Medical Center and Case Western Reserve University, Cleveland, OH, USA