1. Department of Infectious Disease Control Faculty of Medicine Oita University Yufu Japan
2. Department of Gastroenterology Faculty of Medicine Oita University Yufu Japan
3. Department of Anatomy, Histology, and Pharmacology Faculty of Medicine Universitas Airlangga Surabaya Indonesia
4. Laboratory of Immune Regulation Department of Microbiology and Immunology Graduate School of Medicine WPI Immunology Frontier Research Center Osaka University Suita Japan