1. Department of Medicine Perelman School of Medicine at the University of Pennsylvania Philadelphia PA
2. Department of Medicine Mayo Clinic Rochester MN
3. Center for Clinical Epidemiology and Biostatistics Perelman School of Medicine at the University of Pennsylvania Philadelphia PA
4. Department of Medicine Penn State Milton S. Hershey Medical Center Hershey PA
5. Department of Medicine Cleveland Clinic Cleveland OH
6. Department of Medicine UT‐Southwestern Dallas TX
7. Department of Medicine University of Colorado Denver CO
8. Department of Medicine Tufts Medical Center Boston MA
9. Department of Pediatrics Vanderbilt University Nashville TN
10. Department of Medicine Vanderbilt University Nashville TN
11. Department of Pathology and Laboratory Medicine University of Vermont Burlington VT
12. Institute of Cardiovascular and Medical Sciences University of Glasgow Glasgow United Kingdom
13. University/British Heart Foundation Centre for Cardiovascular Science and Edinburgh Mass Spectrometry Core University of Edinburgh Edinburgh United Kingdom
14. Strathclyde Institute of Pharmacy and Biomedical Sciences University of Strathclyde Glasgow United Kingdom
15. Department of Medicine University of Arizona Phoenix AZ