1. Department of Medical Microbiology and Immunology, University of California at Davis, Davis, California, USA
2. Institute for Immunology & Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hanover, Germany
3. Department of Immune Regulation, Shionogi Global Infectious Diseases Division, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
4. Department of Pediatrics, School of Medicine, University of California San Diego, La Jolla, California, USA
5. Chiba University-UC San Diego Center for Mucosal Immunology, Allergy, and Vaccines (CU-UCSD cMAV), La Jolla, California, USA
6. Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
7. Department of Bacteriology, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan