1. Division of Cardiovascular Medicine; University of Utah; Salt Lake City
2. Department of Medicine; University of Massachusetts Medical School; Worcester Massachusetts
3. St Luke's-Roosevelt Hospital of the Mount Sinai Health System; New York New York
4. Department of Cardiovascular Medicine; Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
5. University of Arkansas for Medical Sciences; Little Rock Arkansas
6. New York University School of Medicine; New York New York
7. Texas Tech University Health Sciences Center; El Paso Texas
8. New York Medical College; Valhalla New York
9. John Ochsner Heart and Vascular Institute; Ochsner Clinical School/University of Queensland School of Medicine; New Orleans, Louisiana