1. Department of Medicine Division of Cardiology University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
2. Department of Biostatistics University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
3. Centers for Behavioral and Preventive Medicine The Miriam Hospital Providence Rhode Island USA
4. Schools of Medicine and Public Health Brown University Providence Rhode Island USA
5. Department of Internal Medicine (Cardiovascular Medicine) Yale School of Medicine New Haven Connecticut USA
6. Department of Anesthesiology Yale School of Medicine New Haven Connecticut USA