1. Kolmarden Zoo, Veterinärkliniken, 618 92 Kolmården, Sweden
2. Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Strasse 17, 10315 Berlin, Germany
3. Department of Veterinary Microbiology and Pathology, Washington State University, 100 Dairy Road, Bustad 302 VMP, Pullman, Washington 99164, USA
4. Marwell Wildlife, Conservation Department, Colden Common, Winchester SO211JH, UK
5. Department of Veterinary and Capture Services, Kenya Wildlife Service, PO Box 40241-00100, Nairobi, Kenya