1. Department of Laboratory Medicine and Pathology, Hennepin County Medical Center, and University of Minnesota, Minneapolis, MN
2. Division of Cardiology, Department of Medicine, Hennepin County Medical Center and Minneapolis Heart Institute, Abbott-Northwestern Hospital, Minneapolis, MN
3. Department of Emergency Medicine, Hennepin County Medical Center and University of Minnesota, Minneapolis, MN
4. Department of Laboratory Medicine and Pathology, Hennepin County Medical Center, Minneapolis, MN
5. Cardiac Biomarkers Trials Laboratory (CBTL), Minneapolis Medical Research Foundation, Minneapolis, MN