1. University of Chicago Medical Center; Chicago Illinois
2. Saint Luke's Mid America Heart Institute; Kansas City Missouri
3. University of Missouri Kansas City; Kansas City Missouri
4. Monash Heart; Melbourne Australia
5. Research Medical Center; Kansas City Missouri
6. University of Washington; Seattle Washington
7. Columbia University, New York Presbyterian Hospital; New York New York
8. York Hospital; York Pennsylvania
9. Banner Good Samaritan Medical Center, Phoenix, AZ and Banner Heart; Mesa Arizona
10. Torrance Medical Center; Torrance California
11. Boone County Hospital; Columbia Missouri
12. Peacehealth Sacred Heart Medical Center; Springfield Oregon
13. Alexian Brothers Medical Center; Chicago Illinois
14. FHS; Albuquerque New Mexico