1. Tohoku University Graduate School of Medicine, Sendai, Japan
2. Kagawa University Life Science Research Center and Faculty of Medicine, Kagawa, Japan
3. Tohoku-RITM Research Center for Emerging and Reemerging Infections, Muntinlupa City, the Philippines
4. Research Institute for Tropical Medicine, Muntinlupa City, the Philippines
5. Chubu University, Health Science Hills, College of Life and Health Sciences, Kasugai, Japan
6. Yamagata University Faculty of Medicine, Yamagata, Japan
7. Yamagata Prefectural Institute of Public Health, Yamagata, Japan