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Dr
Elisabetta Visalberghi and Dr.
Elsa Addessi, ISTC-CNR Laboratory of Cognitive
Primatology, Rome, Italy
Many thanks to the staff at Centro
Primati in Bioparco Rome.
Prof
Dr Karin Schermelleh-Engel, Goethe-Universität Frankfurt am
Main, Germany
Prof
Dr Anja Widdig, Leipzig University and Max Planck Institute for Evolutionary Anthropology,
Leipzig, Germany
MSc
Karlijn
Gosselt and Dr Liesbeth Sterck. Department
of Behavioural Biology, Utrecht University, The Netherlands
MSc
Rishi
Kumar, National
Institute of Advanced Studies, Indian Institute of Science Campus,
Bangalore, India
We are most grateful to:



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