1. East Carolina Heart Institute East Carolina University Greenville North Carolina USA
2. Christchurch Hospital Christchurch New Zealand
3. King's College Hospital London UK
4. Cardiology Department St. Antonius Hospital Nieuwegein Netherlands
5. Amsterdam University Medical Centers Amsterdam Netherlands
6. London Health Sciences Centre London Ontario Canada
7. Northwestern University Evanston Illinois USA
8. CHU de Rennes Hôpital Pontchaillou Rennes France
9. University of California San Diego San Diego California USA
10. Medtronic Inc. Mounds View Minnesota USA
11. Mayo Clinic Rochester Minnesota USA