1. Department of Medical Technology, School of Life and Environmental Science, Azabu University, Japan
2. Department of Clinical Laboratory Science and Technology, Nitobe Bunka College, Japan
3. Department of Virology, Institute of Tropical Medicine, Nagasaki University, Japan
4. Department of Virology I, National Institute of Infectious Diseases, Japan
5. Department of Microbiology and Infection, Kochi Medical School, Kochi University, Japan
6. Kochi City Meat Inspection Office, Japan
7. Kanagawa Prefectural Institute of Public Health, Japan