1. Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO, USA.
2. Key Laboratory of Marine Drugs, Ministry of Education, Ocean University of China, Qingdao, China.
3. Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
4. Program in Virology, Harvard Medical School, 200 Longwood Ave., Boston, MA, USA.
5. Division of Gastroenterology, Department of Medicine, Washington School of Medicine, St. Louis, MO, USA.
6. Department of Pathology, Stanford School of Medicine, Stanford, CA, USA.
7. VA Palo Alto Health Care System, Department of Veterans Affairs, Palo Alto, CA, USA.
8. Division of Gastroenterology and Hepatology, Department of Medicine, and Department of Microbiology and Immunology, Stanford School of Medicine, Stanford, CA, USA.
9. Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA.