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De Nys,  Hélène M.
Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;

Boesch,  Christophe
Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;

Wittig,  Roman M.
Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;

Mundry,  Roger
Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;
Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;