1. Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty University of Zurich Zurich Switzerland
2. Clinic for Diagnostic Imaging, Vetsuisse Faculty University of Zurich Zurich Switzerland
3. Divison of Ruminant Nutrition, Department of Animal Sciences University of Goettingen Goettingen Germany
4. Department of Zoology and Entomology University of the Free State Bloemfontein South Africa