1. Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 260, 8057 Zurich, Switzerland
2. Department of Zoology and Entomology, University of the Free State, PO Box 339, 9300 Bloemfontein, South Africa
3. Research Centre in Evolutionary Anthropology and Palaeoecology, Liverpool John Moores University, Liverpool, UK
4. School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA
5. California Polytechnic State University, San Luis Obispo, CA, USA