1. Center for the Advanced Study of Hominid Paleobiology and Department of Anthropology; The George Washington University; Washington DC 20052
2. Dallas Zoo; Dallas Texas 75203
3. Mountain Gorilla Veterinary Project, School of Veterinary Medicine; University of California Davis; Davis California 95616
4. Department of Life Sciences; University of Coimbra; 3001-056 Coimbra Portugal
5. Neuroscience Institute; Georgia State University; Atlanta Georgia 30303
6. Division of Developmental and Cognitive Neuroscience; Yerkes National Primate Research Center; Atlanta Georgia 30329
7. Cleveland Metroparks Zoo; Cleveland Ohio 44109
8. Rwanda Development Board; Department of Tourism and Conservation; Kigale Rwanda
9. Department of Psychology; Trinity University; San Antonio Texas 78212
10. Department of Anthropology and School of Biomedical Sciences; Kent State University; Kent Ohio 44240
11. Fishberg Department of Neuroscience and Friedman Brain Institute; Icahn School of Medicine at Mount Sinai; New York New York 10029
12. New York Consortium in Evolutionary Primatology; New York New York 10024
13. Institute of Neuroscience and Medicine; Research Center Jülich; 52425 Jülich Germany
14. C.&O. Vogt Institute of Brain Research; Heinrich-Heine University Düsseldorf; 40225 Düsseldorf Germany
15. Department of Psychiatry, Psychotherapy, and Psychosomatics; RWTH Aachen University; 52074 Aachen Germany