1. Graduate Institute of Animal Vaccine Technology, College of Veterinary Medicine, National Pingtung University of Science and Technology, 1, Shuefu Road, Neipu, Pingtung 912, Taiwan, Republic of China
2. Institute of Wildlife Conservation, College of Veterinary Medicine, National Pingtung University of Science and Technology, 1, Shuefu Road, Neipu, Pingtung 912, Taiwan, Republic of China
3. Primate Research Institute, Kyoto University, Inuyama, Aichi 484-8506, Japan