1. Division of Cardiology, Department of Internal Medicine; University of Texas Southwestern Medical Center; Dallas TX USA
2. Section of Cardiovascular Medicine; Yale University School of Medicine; New Haven CT USA
3. Division of Nephrology, Department of Internal Medicine; University of Texas Southwestern Medical Center; Dallas TX USA
4. Division of Cardiovascular Medicine; University of Utah Health Sciences Center; Salt Lake City UT USA
5. Department of Cardiovascular Medicine, Cleveland Clinic; Cleveland OH USA