1. School of Human Evolution & Social Change, Arizona State University, Tempe, AZ 85287, USA.
2. Department of Anthropology, University of Missouri, Columbia, MO 65211, USA.
3. Department of Anthropology, SIL International, Dallas, TX 75236, USA.
4. Department of Anthropology, Southern Methodist University, Dallas, TX 75275, USA.
5. Department of Anthropology, Hawassa University, Hawassa, Ethiopia.
6. Department of Anthropology, Washington State University, Vancouver, WA 98686, USA.
7. Department of Anthropology, Durham University, Durham DH1 3LE, UK.
8. Department of Anthropology, University of Utah, Salt Lake City, UT 84112, USA.
9. Department of Anthropology, Stanford University, Stanford, CA 94305, USA.