1. Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine
2. Graduate School of Medicine, Center for Infectious Diseases, Kobe University
3. Department of Dermatology, Nara Medical University School of Medicine
4. Osaka Institute of Public Health
5. The Research Foundation for Microbial Diseases of Osaka University
6. Department of Public Health Medicine, Faculty of Medicine, University of Tsukuba