1. Division of Cardiovascular Diseases University of Alabama at Birmingham Birmingham AL USA
2. Division of Cardiovascular Diseases Texas Tech University Health Science Center El Paso El Paso TX USA
3. Division of Cardiovascular Medicine Brigham and Women’s Hospital Boston MA USA
4. Department of Surgery University of Alabama at Birmingham Birmingham AL USA
5. Department of Epidemiology Texas Tech University Health Science Center El Paso El Paso TX USA
6. Division of Cardiovascular Diseases University of Arizona Tucson AZ USA