1. Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
2. Department of Biomedical Engineering, Oregon Health & Science University, Portland, Oregon
3. School of Medical Technology, Faculty of Health Science, Gunma Paz University, Takasaki, Japan
4. Infection Control Office, Yamanashi University Hospital, Yamanashi, Japan
5. Fuefuki Central Hospital, Fuefuki, Japan