1. Anthropology Department University of California Santa Cruz Santa Cruz California USA
2. Anthropology Department, Center for the Advanced Study of Human Paleobiology George Washington University Washington District of Columbia USA
3. Department of Human Behavior, Ecology and Culture Max Planck Institute for Evolutionary Anthropology Leipzig Germany
4. Department for the Ecology of Animal Societies Max Planck Institute of Animal Behavior Konstanz Germany
5. Centre for Research and Conservation, Royal Zoological Society of Antwerp Antwerp Belgium