About the Authors

Robert M Sapolsky

To whom correspondence should be addressed. E-mail: sapolsky@stanford.edu

Affiliations Department of Biological Sciences and Department of Neurology and Neurological Sciences, Stanford University, Stanford, California, United States of America, Institute of Primate Research, National Museums of Kenya Karen, Nairobi, Kenya

Lisa J Share

Affiliation Department of Biological Sciences and Department of Neurology and Neurological Sciences, Stanford University, Stanford, California, United States of America

Competing Interests

The authors have declared that no conflicts of interest exist.

Author Contributions

RMS and LJS conceived, designed, and performed the experiments. RMS analyzed the data and contributed reagents/materials/analysis tools. RMS and LJS wrote the paper.