1. Divisions of Cardiology, Veterinary Hospital, University of Zurich, Winterthurerstrasse 260, CH‐8057 Zurich, Switzerland
2. Paediatric Hospital, Division of Cardiology, University of Zurich, CH‐8057 Zurich, Switzerland
3. Department of Internal Medicine, Division of Cardiology, University of Zurich, CH‐8057 Zurich, Switzerland
4. Diagnostic Imaging, Veterinary Hospital, University of Zurich, Winterthurerstrasse 260, CH‐8057 Zurich, Switzerland
5. Anaesthesiology, Veterinary Hospital, University of Zurich, Winterthurerstrasse 260, CH‐8057 Zurich, Switzerland
6. Clinic for Small Animal Internal Medicine, Veterinary Hospital, University of Zurich, Winterthurerstrasse 260, CH‐8057 Zurich, Switzerland
7. Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL 61801, USA