1. Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio
2. Department of Internal Medicine, John H. Stroger Jr Hospital of Cook County, Chicago, Illinois
3. Department of Internal Medicine, Dow University of Health Sciences, Karachi, Pakistan
4. Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
5. Department of Cardiovascular Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
6. Department of Cardiovascular Medicine, Mayo Clinic, Phoenix, Arizona
7. Department of Cardiovascular Medicine, Duke University, Durham, North Carolina