About the Authors
- Roland Hilgartner
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* E-mail: hilgartner@gmx.de
Affiliation Affenberg Salem, Salem, Germany
- Daniel Stahl
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Affiliation Department of Biostatistics, King's College London, Institute of Psychiatry, London, United Kingdom
- Dietmar Zinner
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Affiliation Cognitive Ethology Laboratory, German Primate Center, Göttingen, Germany
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: RH DZ DS. Performed the experiments: RH. Analyzed the data: RH DZ DS. Contributed reagents/materials/analysis tools: RH DZ DS. Contributed to the writing of the manuscript: RH DZ DS.