1. Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands
2. Section of Endocrinology, Department of Medicine, Yale University School of Medicine, New Haven, Connecticut
3. Division of Cardiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
4. Division of Cardiology, University of Toronto, Toronto, Ontario, Canada
5. Department of Internal Medicine, University of Virginia, Charlottesville, Virginia