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