1. Lester E. Fisher Center for the Study and Conservation of Apes, Lincoln Park Zoo, Chicago, IL, USA
2. Language Research Center, Georgia State University, Atlanta, GA, USA
3. Michale E. Keeling Center for Comparative Medicine and Research, UT MD Anderson Cancer Center, Bastrop, TX, USA
4. Department of Psychology & Neuroscience Institute, Georgia State University, Atlanta, GA, USA