Affiliation: | 1. Private Veterinary Practice, , Czelad?, ?l?skie, 41‐250 Poland;2. Subdepartment of Clinical Diagnostics and Veterinary Dermatology, University of Life Sciences in Lublin, , Lublin, 20‐612 Poland;3. Subdepartment of Internal Diseases of Farm Animals and Horses, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, , Lublin, 20‐612 Poland |