1. Department of Laboratory Medicine Keio University School of Medicine Shinjuku‐ku Tokyo Japan
2. Department of Infectious Diseases Keio University School of Medicine Shinjuku‐ku Tokyo Japan
3. Clinical Laboratory Keio University Hospital Shinjuku‐ku Tokyo Japan
4. Department of Epidemiology and Preventive Medicine Keio University School of Medicine Shinjuku‐ku Tokyo Japan
5. Department of Microbiology and Immunology Keio University School of Medicine Shinjuku‐ku Tokyo Japan
6. Division of Gene Regulation Institute for Advanced Medical Research Keio University School of Medicine Shinjuku‐ku Tokyo Japan