1. Department of Immunology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
2. Christopher S. Bond Life Sciences Center, Department of Molecular Microbiology and Immunology, and Department of Veterinary Pathobiology, University of Missouri, Columbia, MO, USA
3. Hokkaido University, Institute for Vaccine Research and Development (HU-IVReD), Sapporo, Japan
4. Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan, TX, USA