1. Research & Development Center; Fuso Pharmaceutical Industries; Osaka Osaka 536-8523 Japan
2. Department of Pathology; Osaka Prefectural Institute of Public Health; Osaka Osaka 537-0025 Japan
3. Department of Food Microbiology; Osaka Prefectural Institute of Public Health; Osaka Osaka 537-0025 Japan
4. Department of Microbiology and Immunochemistry; Asahikawa Medical College; Asahikawa Hokkaido 078-8510 Japan
5. Department of First Biochemistry; Asahikawa Medical College; Asahikawa Hokkaido 078-8510 Japan
6. Department of Global Epidemiology; Hokkaido University Research Center for Zoonosis Control; Sapporo Hokkaido 060-0818 Japan