1. The Ohio State University Department of Veterinary Clinical Sciences Columbus Ohio USA
2. Cummings School of Veterinary Medicine Tufts University North Grafton Massachusetts USA
3. Royal Veterinary College Clinical Sciences and Services London UK
4. University of Zürich Clinic for Small Animal Internal Medicine Zürich Switzerland
5. North Downs Specialist Referrals Bletchingley UK
6. MedVet Cincinnati and Dayton Ohio USA
7. MedVet Columbus Ohio USA
8. University of Munich Clinic of Small Animal Medicine Munich Germany
9. Charlotte Animal Referral & Emergency Charlotte North Carolina USA
10. New England Veterinary Cardiology Durham North Carolina USA
11. Boehringer Ingelheim Vetmedica GmbH Ingelheim Germany