1. Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
2. Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi, Japan
3. Department of Microbiology, New York University School of Medicine, New York, New York, USA
4. Department of Public Health, Kobe University Graduate School of Health Sciences, Hyogo, Japan
5. Faculty of Pharmaceutical Sciences, Nagasaki International University, Nagasaki, Japan