1. School of Anthropology, University of Arizona, PO Box 210030, Tucson, AZ 85721-00030, USA
2. Department of Anthropology, Hunter College, 695 Park Avenue, New York, NY 10065, USA
3. New York Consortium for Evolutionary Primatology, New York, USA
4. Department of Anthropology, University of Texas at Austin, 1 University Avenue, Austin, TX 78712, USA