1. Division of Small Animal Internal Medicine; Vetsuisse Faculty of the University of Bern; Bern; Switzerland
2. Small Animal Clinic; Justus-Liebig University; Giessen; Germany
3. Section of Epidemiology; Vetsuisse Faculty of the University of Zurich; Zurich; Switzerland
4. Department for Companion Animals and Horses at the University of Veterinary Medicine; Vienna; Austria
5. Department of Small Animal Medicine of the University of Leipzig; Leipzig; Germany