1. Institute of Animal Pathology Vetsuisse Faculty University of Bern Länggassstrasse 122 Bern3012Switzerland
2. Dermfocus, Vetsuisse Faculty, Inselspital Bern University Hospital Freiburgstrasse 14 Bern3010Switzerland
3. Department of Veterinary Pathobiology College of Veterinary Medicine & Biomedical Science Texas A&M University 4467 TAMU College Station TX77843USA
4. Department of Clinical Veterinary Medicine Division of Small Animal Surgery Vetsuisse Faculty University of Bern Länggassstrasse 128 Bern3012Switzerland