1. School of Psychology, Centre for Research in Animal Behaviour, University of Exeter, Exeter, UK
2. Department of Anthropology, New York University, New York, NY, USA
3. Center for Evolution and Medicine, Arizona State University, Tempe, AZ, USA
4. School of Life Sciences, Arizona State University, Tempe, AZ, USA
5. School for Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA