1. Department of Cardiology, Leiden University Medical Center, Leiden, the Netherlands
2. Departments of Medicine and Physiology, Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, Connecticut
3. Department of Medicine, Cardiovascular Division, Mayo Clinic College of Medicine, Rochester, Minnesota
4. Department of Medicine, Division of Cardiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
5. Department of Medicine, Division of Endocrinology and Metabolism, Indiana University, Indianapolis, Indiana
6. Department of Medicine, Division of Endocrinology and Metabolism, University of Virginia, Charlottesville, Virginia