1. Public Health, Department of Social Medicine Osaka University Graduate School of Medicine Osaka Japan
2. Department of Public Health Kindai University Faculty of Medicine Osakasayama Japan
3. Division of Clinical Virology, Department of Microbiology and Infectious Diseases Kobe University Graduate School of Medicine Hyogo Japan
4. Department of Dermatology Nara Medical University School of Medicine Nara Japan
5. The Research Foundation for Microbial Diseases of Osaka University Osaka Japan
6. Institute of Global Health Policy Research (iGHP), Bureau of International Health Cooperation, National Center for Global Health and Medicine Tokyo Japan