1. Department of Pharmacy, University of Yamanashi Hospital, 1110, Shimokato, Chuo, Yamanashi 409–3898, Japan
2. Department of Public Health and Epidemiology, Meiji Pharmaceutical University, 2–522–1, Noshio, Kiyose, Tokyo 204–8588, Japan
3. Division of Infection Control and Prevention, University of Yamanashi Hospital, 1110, Shimokato, Chuo, Yamanashi 409–3898, Japan
4. Department of Clinical Laboratory, University of Yamanashi Hospital, 1110, Shimokato, Chuo, Yamanashi 409–3898, Japan