1. Vetsuisse Faculty; Clinic for Zoo Animals; Exotic Pets and Wildlife; University of Zurich; Zurich Switzerland
2. Vetsuisse Faculty; Department of Farm Animals; University of Zurich; Zurich Switzerland
3. Department of Animal Sciences; Ruminant Nutrition; University of Göttingen; Göttingen Germany
4. Florisbad Quaternary Research; National Museum; Bloemfontein South Africa
5. Centre for Environmental Management; University of the Free State; Bloemfontein South Africa