Pika, Simone http://orcid.org/0000-0002-4398-2337
Fröhlich, Marlen
Funding for this research was provided by:
Alexander von Humboldt-Stiftung (DEU/1069105)
Wenner-Gren Foundation (8784)
Article History
Received: 8 March 2017
Revised: 9 December 2017
Accepted: 29 December 2017
First Online: 24 January 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the chimpanzee projects at which the studies were conducted.