1. Scripps Memorial Hospital, La Jolla, CA, USA;
2. Baylor Heart and Vascular Institute, Baylor University Medical Center, Baylor Jack and Jane Hamilton Heart and Vascular Hospital, Dallas, TX, USA;
3. San Diego Cardiac Center, SHARP Memorial Hospital, San Diego, CA, USA;
4. Vanderbilt University Medical Center, Nashville, TN, USA;
5. Edwards Lifesciences, Irvine, CA, USA;
6. CTI Clinical Trial and Consulting Services, Covington, KY, USA