1. Department of Microbiology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan.
2. Department of Infectious Diseases, Keio University School of Medicine, Tokyo, Japan.
3. Clinical Laboratory, National Cancer Center Hospital, Tokyo, Japan.
4. Saitama Prefectural Institute of Public Health, Saitama, Japan.
5. Department of Clinical Laboratories, Keio University School of Medicine, Tokyo, Japan.
6. Department of Pediatrics, Hakujikai Memorial Hospital, Tokyo, Japan.