1. Department of Microbiology and Immunology, Medical College of Virginia Campus; Virginia Commonwealth University; Richmond VA
2. McGuire Veterans Affairs Medical Center; Virginia Commonwealth University; Richmond VA
3. Department of Gastroenterology, the First Affiliated Hospital; Wenzhou Medical University; Wenzhou China
4. Department of Pathology, Medical College of Virginia Campus; Virginia Commonwealth University; Richmond VA
5. Department of Internal Medicine/GI Division; Virginia Commonwealth University; Richmond VA