1. Department of Epidemiology and Public Health Graduate School of Medicine Yokohama City University Yokohama, Japan.
2. Department of Global HealthSchool of Health Sciences University of the Ryukyus, Okinawa, Japan
3. Department of International Assistance College of Human Sciences and Health Osaka Prefecture University Osaka, Japan
4. Department of International Collaboration Graduate School of Human SciencesOsaka University Osaka, Japan