1. Department of Psychology, John R. and Kathy R. Hairston College of Health and Human Sciences, North Carolina Agricultural and Technical State University, Greensboro, NC USA
2. Department of Biology, College of Science and Technology, North Carolina Agricultural and Technical State University, Greensboro, NC USA
3. Program in Liberal Medical Education, Division of Biology and Medicine, Brown University, Providence
4. Department of Animal Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY, USA