1. Department of Clinical Science and Services, Royal Veterinary College University of London London UK
2. CVCA Cardiac Care for Pets Towson Maryland USA
3. Clinic of Small Animal Medicine Ludwig‐Maximilians‐University of Munich Munich Germany
4. HeartVets Porthcawl UK
5. Stamford Veterinary Centre Lincolnshire UK
6. Cheshire Cardiology Cheshire UK
7. Fachtierarztpraxis Am Sandpfad Wiesloch Germany
8. RA Kardiologie Muehlheim am Main Germany
9. Tierarzt Ingo Schneider Nidderau Germany
10. Department of Veterinary Clinical Studies, School of Veterinary Medicine University of Pennsylvania Philadelphia Pennsylvania USA
11. College of Veterinary Medicine Texas A&M University College Station Texas USA
12. Department of Comparative Biomedical Science, Royal Veterinary College University of London London UK
13. Research Support Office, Royal Veterinary College University of London London UK