1. Department of Pathology, Clements University Hospital, University of Texas Southwestern Medical Center, Dallas
2. Division of Cardiology, Department of Internal Medicine, Clements University Hospital, University of Texas Southwestern Medical Center, Dallas
3. Johns Hopkins Ciccarone Center for the Prevention of Heart Disease, Baltimore, MD
4. Clements University Hospital, University of Texas Southwestern Medical Center, Dallas
5. Department of Pathology, Medical College of Wisconsin, Milwaukee
6. Department of Laboratory Medicine and Pathology, Hennepin County Medical Center and University of Minnesota, Minneapolis