1. Mount Sinai School of Medicine, New York City, New York2St John’s Health Center, Santa Monica, California3Homolka Hospital, Prague, Czech Republic
2. Cardiovascular Center Frankfurt, Sankt Katharinen, Frankfurt, Germany
3. Mount Sinai School of Medicine, New York City, New York
4. St John’s Health Center, Santa Monica, California
5. Foundation for Cardiovascular Medicine, La Jolla, California
6. Homolka Hospital, Prague, Czech Republic
7. St Luke’s Hospital, Kansas City, Missouri
8. Intermountain Medical Center, Murray, Utah
9. Cedars Sinai Medical Center, Los Angeles, California
10. Arizona Heart Rhythm Center, Scottsdale
11. Boston Scientific, St Paul, Minnesota
12. Mayo Clinic College of Medicine, Rochester, Minnesota