About the Authors
- Zanna Clay
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* E-mail: zannaclay@emory.edu
Affiliation Living Links, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
- Frans B. M. de Waal
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Affiliation Living Links, Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: ZC FDW. Performed the experiments: ZC. Analyzed the data: ZC. Contributed reagents/materials/analysis tools: FDW. Wrote the paper: ZC FDW.