1. Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
2. Vetsuisse Faculty, Department of Clinical Veterinary Medicine, University of Bern, Bern, Switzerland
3. Current address: Veterinary Faculty, University of Leipzig, D‐04103 Leipzig, Germany
4. Current address: Clinic for Internal Medicine, Department for Companion Animals and Horses, University of Veterinary Medicine, A‐1210 Vienna, Austria
5. Vetsuisse Faculty, Veterinary Physiology, University of Bern, Bern, Switzerland