1. Institute of Animal Pathology, University of Bern, Bern, Switzerland
2. Clinic for Zoo Animals, Exotic Pets and Wildlife, University of Zurich, Zurich, Switzerland
3. Zoo Basel, Basel, Switzerland
4. Institute of Veterinary Bacteriology, University of Bern, Bern, Switzerland
5. Centre de recherche pour la conservation des zones humides méditerranéennes, le Sambuc, France
6. Institute of Virology, University of Zurich, Zurich, Switzerland
7. Clinic for Small Animal Medicine, Department of Dermatology, University of Zurich, Zurich, Switzerland
8. Division of Veterinary Anatomy, University of Bern, Bern, Switzerland