1. Department of Immunology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
2. Department of Endocrinology, Hematology and Gerontology, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
3. Department of Rheumatology, Sapporo Medical University, Sapporo 060-8556, Japan
4. Department of Otorhinolaryngology/Head and Neck Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
5. Laboratory for Immunotherapy, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa 230-0045, Japan
6. Department of Cellular and Molecular Medicine, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
7. Chiba University Synergy Institute for Futuristic Mucosal Vaccine Research and Development, Chiba University, Chiba 260-8670, Japan