1. Department of Health and Medical Sciences, Shinshu University Graduate School of Medicine, Nagano, Japan
2. Division of Infection Control, Dokkyo Medical University Hospital, Tochigi, Japan
3. Miroku Medical Laboratory Inc., Nagano, Japan
4. Department of Infection Control and Prevention, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
5. Department of Bacteriology, Gunma University, Graduate School of Medicine, Gunma, Japan
6. Department of Microbiology, Fujita health University, Aichi, Japan
7. Department of Bacteriology, Nagoya University Graduate School of Medicine, Aichi, Japan
8. Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan