1. Nanjing Medical University; Nanjing Jiangsu China
2. Veterans Research and Education Foundation; VA Medical Center; Oklahoma City OK USA
3. Diabetes Care & Research Center; Jiangsu Province Institute of Geriatrics; Nanjing Jiangsu China
4. Department of Physiology; University of Oklahoma; Oklahoma City OK USA
5. Division of Gastroenterology; The First Affiliated Hospital of Nanjing Medical University; Nanjing Jiangsu China
6. Transtimulation Research Inc.; Oklahoma City OK USA
7. Division of Gastroenterology and Hepatology; Johns Hopkins University; Baltimore MD USA