1. Department of Ophthalmology, Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany
2. Institute for Microbiology, University of Veterinary Medicine Hannover, Foundation, 30173 Hannover, Germany
3. Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany
4. Department of Internal Medicine, Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany