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Amici,  Federica       
Department of Comparative Cultural Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;

Holzner,  Anna       
Department of Human Behavior Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;

Widdig,  Anja       
Department of Primate Behavior and Evolution, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;
Research Group Primate Behavioural Ecology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;