1. Bluhm Cardiovascular Institute, Northwestern University, Chicago, Illinois
2. Division of Cardiology, Minneapolis Heart Institute, Minneapolis, Minnesota
3. Caption Health, Brisbane, California
4. Division of Cardiology, Scripps Health, San Diego, California
5. Division of Cardiology, MedStar Washington Hospital Center, Washington, DC
6. Houston Methodist, Houston, Texas
7. Section of Cardiology, The University of Chicago, Chicago, Illinois
8. MedStar Health Research Institute, Washington, DC