1. Louis Stokes Veteran Affairs Medical Center Cleveland OH USA
2. Case Western Reserve University School of Medicine Cleveland OH USA
3. Mayo Clinic, Rochester Rochester MN USA
4. King's College London London UK
5. Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center Cleveland OH USA
6. Johns Hopkins University School of Medicine Baltimore MD USA
7. Queen Alia Heart Institute Amman Jordan
8. Robertson Center for Biostatistics University of Glasgow Glasgow UK