1. Cedars-Sinai Heart Institute; Los Angeles CA 90048 USA
2. Tel Aviv Sourasky Medical Center; Tel Aviv Israel
3. Evanston Hospital; Evanston IL USA
4. The Cleveland Clinic; Cleveland OH USA
5. University of California Davis Medical Center; Sacramento CA USA
6. Washington University School of Medicine; Saint Louis MO USA
7. Duke University Medical Center; Durham NC USA