1. Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Japan; College of Bioresource Science, Nihon University, Kanagawa, Japan
2. College of Bioresource Science, Nihon University, Kanagawa, Japan
3. Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Japan
4. Corporation for Production and Research of Laboratory Primates, Ibaraki, Japan
5. Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Japan. ageyama@nibiohn.go.jp