1. Cognitive Ethology Laboratory German Primate Center Leibniz Institute for Primate Research Goettingen Germany
2. Primate Genetics Laboratory German Primate Center Leibniz Institute for Primate Research Goettingen Germany
3. Centre of Biodiversity and Sustainable Land Use University of Goettingen Goettingen Germany
4. College of Agriculture and Natural Resources Kwame Nkrumah University of Science and Technology Kumasi Ghana
5. Mammalogy Section National Museums of Kenya Nairobi Kenya
6. Department of Biology University of York York United Kingdom
7. Gene Bank of Primates German Primate Center Leibniz Institute for Primate Research Goettingen Germany