1. Veterans Research and Education Foundation, Veterans Affairs Medical Center, Oklahoma City, Oklahoma;
2. Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma;
3. The First Affiliated Hospital of Zhejiang Chinese Medicine University, Hangzhou, China;
4. Guizhou Provincial People's Hospital, Guizhou, Guiyang, China;
5. Ningbo Pace Translational Research Center, Beilun, Ningbo, China; and
6. Division of Gastroenterology and Hepatology, Johns Hopkins Center for Neurogastroenterology, Baltimore, Maryland