1. Department of Anthropology; University of Massachusetts; Amherst MA USA
2. Graduate Program in Organismic and Evolutionary Biology; University of Massachusetts; Amherst MA USA
3. School of Human Evolution and Social Change; Arizona State University; Tempe AZ USA
4. School of Anthropology; University of Arizona; Tucson AZ USA
5. Laboratory for the Evolutionary Endocrinology of Primates; University of Arizona; Tucson AZ USA