1. Department of Anaesthesia, Small Animal Clinic; University of Veterinary Medicine Hannover Foundation; Hannover 30159 Germany
2. Department of Neurology, Small Animal Clinic; University of Veterinary Medicine Hannover Foundation; Hannover 30159 Germany
3. Department of Internal Medicine, Small Animal Clinic; University of Veterinary Medicine Hannover Foundation; Hannover 30159 Germany
4. Department of Biometry, Epidemiology and Information Processing; University of Veterinary Medicine Hannover Foundation; Hannover 30159 Germany
5. Vétoquinol GmbH; Ravensburg 88212 Germany