1. Ape Behaviour & Ecology Group, Department of Evolutionary Anthropology University of Zurich Zurich Switzerland
2. Department of Archaeology University of Cambridge Cambridge UK
3. Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation University of Kent Kent UK
4. Research and Conservation Copenhagen Zoo Copenhagen Denmark
5. Department of Ecology and Conservation Biology Texas A&M University College Station Texas USA
6. Department of Forensic Medicine University of Copenhagen Copenhagen Denmark
7. Department of Biology University of Copenhagen Copenhagen Denmark
8. Institut de Recherche Environnementale de Bossou Bossou Guinea