1. Department of Microbiology, Dokkyo Medical University School of Medicine, Tochigi 321-0293, Japan
2. BD Japan, Co., Ltd, Tokyo 107-0052, Japan
3. Laboratory of Biofunctional Chemistry, Department of Chemistry, Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
4. First Laboratories, Co. Ltd, Kanagawa 211-0013, Japan