1 Department of Clinical Veterinary Medicine, Anaesthesiology and Pain Therapy Section, Vetsuisse Faculty, University of Bern, Bern, Switzerland. Electronic address: alessandro.mirra@vetsuisse.unibe.ch.
2 Department for Clinical Veterinary Medicine, Clinic for Swine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
3 Department of Biomedical Research, Faculty of Medicine, University of Bern, Bern, Switzerland.
4 Department of Clinical Veterinary Medicine, Anaesthesiology and Pain Therapy Section, Vetsuisse Faculty, University of Bern, Bern, Switzerland.