1. Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
2. Chubu University Academy of Emerging Sciences, Kasugai-shi, Aichi, Japan
3. Wildlife Research Center of Kyoto University, Kyoto, Japan
4. Japan Monkey Centre, Inuyama, Aichi, Japan
5. Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
6. Bukit Merah Orang Utan Island Foundation, Perak, Malaysia