1 Anesthesiology and Pain Therapy Division, Department of Veterinary Clinical Science of the Vetsuisse Faculty of Berne, Länggassstrasse 124, Berne, CH-3012, Switzerland
2 Nationales Pferdezentrum Bern, Mingerstrasse 3, Berne, CH-3000, Switzerland
3 Clinical Pharmacology Laboratory, Institute for Infectious Diseases, University of Berne, Murtenstrasse 35, Bern, CH-3010, Switzerland