1. Centre for Clinical Veterinary Medicine Ludwig‐Maximilian University Munich Veterinärstrasse 13 München 80539 Germany
2. Dermatology Unit Clinic for Small Animal Internal Medicine Vetsuisse Faculty University of Zurich Winterthurerstrasse 260 Zurich 8057 Switzerland
3. Tierdermatologie Deisenhofen Schäftlarner Weg 1A Oberhaching 82041 Germany
4. Tierärztliche Klinik Nürnberg Hafen Wertachstraße 1 Nürnberg 90451 Germany
5. The Jackson Laboratory 600 Main Street Bar Harbor ME 04609 USA
6. Department of Dermatology Charles C. Gates Regenerative Medicine and Stem Cell Biology Program University of Colorado at Denver and Health Sciences Center 12800 East 19th Avenue Aurora CO 80045 USA
7. Institute for Veterinary Pathology Ludwig‐Maximilian University Munich Veterinärstrasse 13 München 80539 Germany