1. Division of Gastroenterology and Hepatology, Metro Health Medical Center, The Esophageal and Swallowing Center Case Western Reserve University Cleveland Ohio USA
2. Department of Internal Medicine Cleveland Clinic Foundation Cleveland Ohio USA
3. Duke University School of Medicine and the Durham Veterans Affairs Medical Center Durham North Carolina USA
4. The University of Chicago Medicine Chicago Illinois USA
5. Vanderbilt University Medical Center Nashville Tennessee USA
6. Beth Israel Deaconess Medical Center Boston Massachusetts USA
7. Division of Life Sciences and Medicine, Department of Gastroenterology, The First Affiliated Hospital of USTC University of Science and Technology of China Hefei Anhui China