1. Clinic for Small Animal Internal Medicine, Vetsuisse Faculty; University of Zurich; Zurich Switzerland
2. Institute of Genetics, Vetsuisse Faculty; University of Bern; Bern Switzerland
3. Department of Clinical Veterinary Medicine; Vetsuisse Faculty; University of Bern; Bern Switzerland
4. Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich; Zurich Switzerland