1. Division of Cardiology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas
2. Division of Cardiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
3. Division of Cardiology, Department of Medicine, Duke University, Durham, North Carolina
4. Duke Clinical Research Institute, Duke University, Durham, North Carolina
5. Department of Cardiology, Ziekenhuis Oost Limburg, Genk, Belgium
6. Doctoral School of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
7. Division of Nephrology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas
8. Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio