1. Division of Epidemiology and Community Health University of Minnesota Minneapolis MN USA
2. Department of Epidemiology Rollins School of Public Health Emory University Atlanta GA USA
3. Department of Medicine Larner College of Medicine at the University of Vermont Burlington VT USA
4. Cardiovascular Division Department of Medicine University of Minnesota Minneapolis MN USA
5. Division of Cardiology and Department of Epidemiology Johns Hopkins University Baltimore MD USA