1. Department of Molecular Microbiology, Graduate School of Medicine and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
2. Department of Clinical Laboratory, Tokyo Medical and Dental University Hospital, Tokyo, Japan
3. Department of Bacteriology I, National Institute of Infectious Diseases, Tokyo, Japan
4. Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan
5. National Institute of Infectious Diseases, Tokyo, Japan