1. Clinic for Small Animal Internal Medicine Vetsuisse Faculty University of Zurich Zurich Switzerland
2. Institute for Veterinary Pathology Vetsuisse Faculty University of Zurich Zurich Switzerland
3. Section of Epidemiology Vetsuisse Faculty University of Zurich Zurich Switzerland
4. Department of Animal Medicine, Production and Health University of Padova Legnaro PD Italy
5. Istituto Veterinario di Novara Granozzo con Monticello NO Italy