1. Center for Infectious Diseases Epidemiology and Prevention Research, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
2. Center for Surveillance, Immunization and Epidemiologic Research, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
3. Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
4. Department of Chemistry, Faculty of Science, Tokyo University of Science, Tokyo 162-8601, Japan
5. Nagasaki Prefecture Tsushima Hospital, Nagasaki 817-0322, Japan
6. Nagasaki Prefecture Kamitsushima Hospital, Nagasaki 817-1701, Japan
7. Department of Health Policy, Kochi Public Health and Environmental Science Research Institute, Kochi 780-0850, Japan
8. Department of Public Health, Nagasaki Prefectural Institute for Environmental Research and Public Health, Nagasaki 856-0026, Japan
9. Toyama Institute of Health, 17-1 Nakataikouyama, Imizu, Toyama 939-0363, Japan