1. Departments of Microbiology and Medicine Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania
2. Department of Anthropology Washington University in St. Louis St. Louis Missouri
3. Gombe Stream Research Center Kigoma Tanzania
4. Department of Psychology Franklin and Marshall College Lancaster Pennsylvania
5. School of Natural Sciences and Psychology Liverpool John Moores University Liverpool UK
6. Department of Evolutionary Anthropology Duke University Durham North Carolina
7. Institute of Evolutionary Biology and Centre for Immunity Infection and Evolution University of Edinburgh Edinburgh UK