1. Department of Integrative Biology, University of California, Berkeley, 1005 Valley Life Sciences Building #3101, Berkeley, CA 94720, USA.
2. Department of Evolutionary Anthropology, Duke University, 104 Biological Sciences Building, Durham, NC 27708, USA.
3. Department of Anthropology, University of Minnesota, 301 19th Avenue South, Minneapolis, MN 55455, USA
4. Department of Ecology, Evolution and Behavior, University of Minnesota, St. Paul, MN 55108 USA.
5. Departments of Medicine and Microbiology, Perelman School of Medicine, University of Pennsylvania, 409 Johnson Pavilion, Philadelphia, PA 19104, USA.
6. Department of Integrative Biology, University of Texas at Austin, 2506 Speedway A5000, Austin, TX 78712, USA.